Britax Safe-nSound User manual

Instructions for Installation & Use 1
IMPORTANT: KEEP THIS BOOKLET IN THE PLACE PROVIDED
ON THE CHILD RESTRAINT
Birth to 2-3 years (approx) REARWARD FACING
12 months to 4 years (approx) FORWARD FACING
INSTRUCTION MANUAL
CONVERTIBLE CHILD SEAT
ISOFIX COMPATIBLE
Series No. BS3300A-i20133

Instructions for Installation & Use
2
CHILD SEAT FEATURES - REARWARD FACING 22
SET UP
• GENERAL INFORMATION 24
• CONVERT TO REARWARD FACING 25
• INSTALLING INTO YOUR VEHICLE 27
• RECLINE ANGLE 29
• SEATBELT FOR REARWARD FACING 31
• ISOFLEX®FOR REARWARD FACING 35
• TOP TETHER FOR REARWARD FACING 39
• OPEN ADVANCED SIDE IMPACT CUSHION TECHNOLOGY 41
• HEADREST AND SHOULDER HARNESS 42
• REMOVE CHILD FROM CHILD SEAT 45
• REMOVE CHILD SEAT FROM VEHICLE SEATBELT 46
• REMOVE CHILD SEAT FROM VEHICLE ISOFLEX®47
• STORE REBOUND BAR AND COVER 49
• CLOSE ADVANCED SIDE IMPACT CUSHION TECHNOLOGY 50
QUICK START GUIDE - a shortened version of the manual
• REARWARD FACING SEATBELT 04
• REARWARD FACING ISOFLEX®06
• FORWARD FACING SEATBELT 08
• FORWARD FACING ISOFLEX®10
MEET YOUR CHILD SEAT 12
IMPORTANT INFORMATION AND WARNINGS 14
SHOULDER HEIGHT MARKERS 16
OUTGROWN YOUR CHILD SEAT 20
CHILD SEAT SUITABILITY GUIDE 21
REARWARD FACING
CONTENTS
Scan QR code
for rearward
facing seatbelt
installation video.
Scan QR code
for rearward
facing ISOFLEX®
installation video.
06/04/2021 https://tiny.cc/tiny/31881717/qr/print/l
https://tiny.cc/tiny/31881717/qr/print/l 1/1
06/04/2021 https://tiny.cc/tiny/31881729/qr/print/l
https://tiny.cc/tiny/31881729/qr/print/l 1/1

Instructions for Installation & Use 3
CHILD SEAT FEATURES - FORWARD FACING 51
SET UP
• GENERAL INFORMATION 53
• FORWARD FACING RECLINE POSITIONS 55
• INSTALLING INTO YOUR VEHICLE 56
• SEATBELT FOR FORWARD FACING 58
• ISOFLEX®FOR FORWARD FACING 61
• TOP TETHER FOR FORWARD FACING 66
• HEADREST AND SHOULDER HARNESS 68
• OPEN ADVANCED SIDE IMPACT CUSHION TECHNOLOGY 71
• REMOVE CHILD FROM CHILD SEAT 72
• REMOVE CHILD SEAT FROM VEHICLE SEATBELT 73
• REMOVE CHILD SEAT FROM VEHICLE ISOFLEX®75
• CLOSE ADVANCED SIDE IMPACT CUSHION TECHNOLOGY 77
FORWARD FACING
CARE & MAINTENANCE
CONTENTS
CARE AND MAINTENANCE 78
• CLEAN HARNESS BUCKLE 79
• REMOVE COVER 80
• REPLACE COVER 82
ACCESSORIES 84
INSTALLATION OF VEHICLE UPPER ANCHOR POINT 87
IN CASE OF ACCIDENT 92
WARRANTY 96
Scan QR code
for forward
facing seatbelt
installation video.
Scan QR code
for forward
facing ISOFLEX®
installation video.
06/04/2021 https://tiny.cc/tiny/31881590/qr/print/l
https://tiny.cc/tiny/31881590/qr/print/l 1/1
06/04/2021 https://tiny.cc/tiny/31881702/qr/print/l
https://tiny.cc/tiny/31881702/qr/print/l 1/1

Instructions for Installation & Use
4
QUICK START GUIDE
- REARWARD FACING SEATBELT
Pull
Press
Press
1
2
6
7
8
13
11
15
14
4
Hey, before you install me!
Don't forget to note your serial number found on the seat to complete your warranty registration.
16
Lift out middle cover
12
10
9
Remove
infant insert
5Cover
3
Do not trap buckle
under seatbelt
Lift + latch

Instructions for Installation & Use 5
33
Harness
Straps
not below
green zone
QUICK START GUIDE
- REARWARD FACING SEATBELT
Store
strap
Attach
Pull to tighten
Remove slack
Lift
Remove slack
17 18
20
21 22 23
26
24
27
25
19
Pull
Push
Replace
infant insert
Replace middle cover
28
29
30 Infant use only
DO NOT USE

Instructions for Installation & Use
6
1
14
17 19
11
10
Remove
infant insert
Hey, before you install me!
Don't forget to note your serial number found on the seat to complete your warranty registration.
Lift out middle cover
Under cover
slide button to
release door
Press button
and remove
Lift
door
15
16
Press
9
18
QUICK START GUIDE
- REARWARD FACING ISOFLEX®
13
Pull
Press
7
8
12
2
3
Press to lengthen
Pull
5
4
Lift + latch
6

Instructions for Installation & Use 7
33
Harness
Straps
not below
green zone
Attach
Pull
Remove slack
Lift
20 21
23 26 27
31
32
29 30
Replace
infant insert
Close door and
replace middle cover Push down
Pull to
tighten
QUICK START GUIDE
- REARWARD FACING ISOFLEX®
22
25
24
Pull
Push
Store
strap
28
33
34 Infant use only
DO NOT USE

Instructions for Installation & Use
8
Pull
Press
13
12
Hey, before you install me!
Don't forget to note your serial number found on the seat to complete your warranty registration.
QUICK START GUIDE
- FORWARD FACING SEATBELT
Lift out
middle
cover
Fold up &
Close Studs
Press grey button
Open
Remove Cover
Store
away
Under cover
slide button to
release door
Lift
door
1
2
3
5
4
6 7
8
9
10 11
12
15 16
13 Press
14
Remove infant insert
DO NOT USE

Instructions for Installation & Use 9
Harness
Straps
not below
green zone
Shoulder Level
25mm max
Store
strap
Attach
Remove slack
Pull
Push
Lift
QUICK START GUIDE
- FORWARD FACING SEATBELT
Pull to tighten
Replace
middle
cover
Remove
slack
17 18 19
20
21 22 23
25 26
27 28
29
30
24

Instructions for Installation & Use
10
Hey, before you install me!
Don't forget to note your serial number found on the seat to complete your warranty registration.
QUICK START GUIDE
- FORWARD FACING ISOFLEX®
Lift
door
Under cover
slide button to
release door
13
12
Lift out
middle
cover
Fold up &
Close Studs
Remove Cover
Store
away
Under cover
slide button to
release door
Lift
door
1
2
4
5
67
8
10
Pull
Press
11
12
15 16 18
17
109
Press grey button
Open
3
14
Remove infant insert
DO NOT USE
13 Press

Instructions for Installation & Use 11
Press to lengthen
Press button
and remove
Pull
Harness
Straps
not below
green zone
Shoulder Level
25mm max
Lift
QUICK START GUIDE
- FORWARD FACING ISOFLEX®
Close door and
replace middle cover
Push down
Pull to tighten
Attach
Pull
Push
Remove slack
Pull
Store
strap
19 21
20
22
23 24
25
26
27
28
29 30 31
32 33
34
35

Instructions for Installation & Use
12
REARWARD FACING-
To be used only in a rearward-facing position until the child's shoulders either reach the lower
shoulder height marker (approximately 12 months of age) or reach the middle height marker
(approximately 2 to 3 years of age).
FORWARD FACING-
Then to be used in a forward-facing position until the child's shoulders reach the upper
shoulder height marker (approximately 4 years of age).
Continue to use this child restraint until the child reaches this limit.
Do not use forward facing until child's shoulders are above the lower shoulder height marker.
Infants are at risk of serious injury if they face forward too early.
Children are at risk of serious injury if they move to booster seats too early.
Children who have outgrown this restraint are safest in a larger child restraint with an in-built
harness or a booster seat until their shoulders reach the upper shoulder height marker of the
restraint.
To ensure that your child gets all the protection designed into the restraint PLEASE READ
AND FOLLOW THESE INSTRUCTIONS EXACTLY and use only Britax Safe-n-Sound®
recommended parts and accessories.
If in doubt about the method of installation, consult Britax Childcare or agent, or a child
restraint fitter or, in New Zealand, to consult the agent for the vehicle.
只用于后向式安装，直到婴儿的肩膀达到靠下的肩高标记（大约12个月的宝宝）或者中部的肩高标
记（大约2-3岁的儿童）。然后用于前向式安装，直到儿童的肩膀达到靠上的肩高标记（大约4岁的儿
童）。
在儿童达到该座椅上限以前必须不断使用这一安全座椅。
在儿童肩高未超过靠下的肩高标记之前不得采用前向式坐姿。
婴儿过早乘坐前向式座椅则可能受到严重的伤害。
儿童过早使用垫高椅则可能受到严重的伤害。
个子比该安全座椅大的儿童最安全的做法是乘坐设有内置安全带的更大汽车座椅或垫高椅，直到他们
的肩膀达到该座椅靠上的肩高标记。
MEET YOUR CHILD SEAT

Instructions for Installation & Use 13
ISOFIX COMPATIBLE
There will be straps fitted to each side of the lower part of the seat. Britax flexible strap ISOFIX
Compatible connector technology is known as ISOFLEX®.
WHAT ARE ISOFIX LOW ANCHORAGES IN A VEHICLE?
ISOFIX low anchorages are fixed, standardised anchoring points for securely installing an
ISOFIX compatible child restraint in a vehicle fitted with ISOFIX low anchorages. They are an
alternative method of installing the child restraint without using the car's seatbelt.
ISOFIX is an international standard for vehicle child seat anchorages.
This anchoring technology minimises installation mistakes by optimising the protective eect of
the connection between vehicle and ISOFIX compatible child restraint.
ADVANCED SIDE IMPACT CUSHION TECHNOLOGY (SICT™) PROTECTION
WHY DO I NEED ADVANCED SIDE IMPACT CUSHION TECHNOLOGY (SICT™)?
In the event of an accident, your child must be optimally protected at any age, especially for
the most common types of accidents, frontal and side collision. With side collisions, children
are at most risk, because compared to a frontal collision, side collisions have less crumple
zone to disperse the energy released during impact.
WHAT IS IT?
Our Advanced SICT™– Side Impact Cushion Technology with crumple zone feature is
designed to provide optimum safety to your child in the event of a side impact collision.
HOW DOES IT WORK?
With maximum safety and flexibility in mind, Advanced SICT™can be used when the child
seat is positioned next to the vehicle door. When deployed, it is uniquely designed to enhance
protection in the event of a side impact collision. Combined with the energy absorbing
protective shell, Advanced SICT™significantly reduces the risk of injury to your child.
THE ACTIVE HEADREST RESTRAINT (AHR™)
The Active Headrest Restraint is designed with deeper side wings to shield and protect your
child's head in a side impact crash. The Active Head Restraint has an inner Side Impact
Cushion Technology layer which provides 180 degree protection around your child's head.
The AHR™is adjustable to grow with your child and works in conjunction with SICT to protect
your child's head and minimise the force of impact.
MEET YOUR CHILD SEAT

Instructions for Installation & Use
14
• Fit the restraint firmly to the car seat.
• Fit the harness firmly to the child.
• A loose restraint or harness is dangerous.
• Supervision of children is needed because they may be able to undo the buckles and
adjusters.
• Use the restraint exactly as shown in the instructions.
• DO NOT LEAVE CHILDREN UNATTENDED IN THE CAR.
• Do not alter or modify this restraint.
• Repairs must only be done by the manufacturer or agent.
• Do not allow the restraint to come into contact with polishes, oils, bleach and other
chemicals.
• Destroy the restraint if it has been in a severe crash, even if no damage is visible. See
page 92 & 93.
• DO NOT USE THIS RESTRAINT WITHOUT THE COVER.
• Always secure the loose end of the top tether strap. Do not use the child restraint where
this top tether strap may fall into a split in the seat back or o the side of the seat.
• ALWAYS ATTACH TOP TETHER HOOK AND REMOVE SLACK.
• To ensure infant’s back is evenly supported, do not put more than one nappy on the baby
and make sure the nappy is not thickly folded at the back.
• DO NOT USE A REAR-FACING CHILD RESTRAINT WHERE AN AIRBAG IS FITTED IN
FRONT OF THE SEATING POSITION.
• Do not harness an infant wrapped in a blanket or swaddled. Any blanket or wrap must
only be placed over the harness and infant.
• Rearward and forward facing child restraints should always be correctly installed, properly
adjusted and used as instructed by the manufacturer instructions.
• If your vehicle is not fitted with an anchor point, please contact a Safety Restraint Fitting
Station authorised by the relevant State Government Body for correct fitment of the
restraint. In New Zealand contact the agent for the vehicle. The top tether strap must be
attached to an upper anchorage point using an extension strap if necessary.
• Do not use on any vehicle seat which faces sideways or rearwards.
IMPORTANT INFORMATION AND WARNINGS

Instructions for Installation & Use 15
IMPORTANT:
IMPORTANT INFORMATION AND WARNINGS
TO BE USED WITH A LAP-SASH OR LAP-ONLY SEATBELT OR ISOFIX LOW
ANCHORAGES IN THE BACK OF MOST CARS WITH FORWARD FACING SEATS.
GENERAL
• Do not attach the lower attachment connectors of two separate child restraints to the
same ISOFIX low anchorages in your car.
• Always attach the top tether strap to the child restraint upper anchorage in your car.
• Child restraint lower attachment connectors and the ISOFIX low anchorages in your car
are designed to withstand only those loads imposed by a correctly fitted child restraint.
• Babies and children below 4 years old must not sit in the front seat of a vehicle unless
allowable by the Regional Road Rules. Check your Regional Road Rules.
• Protect all webbing from abrasion and cutting by sharp corners and edges.
• The restraint should not be purchased or sold as a second hand item. It is recommended
not to use child restraints older than 10 years as the protection in an accident may be
reduced.
• THIS RESTRAINT IS NOT SUITABLE FOR USE WHERE THE TOP TETHER STRAP MAY
FALL INTO A SPLIT IN THE SEAT BACK OR OFF THE SIDE OF THE SEAT.
• Seatbelt extenders are not recommended to be used if the seatbelt is not long enough to
secure the child restraint. If seatbelts are too short then seek advice from a child restraint
fitter and consider their recommendations before using a seatbelt extender. If you use
a seatbelt extender then ensure that the seatbelt buckle does not enter the rearward or
forward facing belt paths.
• A rear facing child restraint should not be used in the front seat if a passenger airbag is
fitted and cannot be disabled.
• Ensure babies and toddlers are adequately shaded from direct sunlight through side or
rear windows.
• Check the car is ventilated by opening windows or using the car's ventilation system
taking in external air. Recirculation setting is not suitable for providing ventilation.
• THIS RESTRAINT MUST BE ATTACHED TO A CHILD RESTRAINT UPPER ANCHORAGE
POINT IN THE CAR. REFER TO CAR OWNER'S HANDBOOK FOR LOCATION OF
UPPER ANCHORAGE POINTS. REFER TO A CHILD RESTRAINT FITTING STATION IF
NO UPPER ANCHORAGE POINTS ARE IN THE MOTOR CAR. Refer to pages 87 to 91.

Instructions for Installation & Use
16
SHOULDER HEIGHT MARKERS
Shoulder height markers are featured clearly on the child seat (as seen in diagram).
The markers provide an indicator for when your child has outgrown the child's seat rearward
or forward facing modes.

Instructions for Installation & Use 17
SHOULDER HEIGHT MARKERS
Your child MUST be
forward facingforward facing if
their shoulders are
above the middle
marker.
If your child's shoulders are above the
upper marker they have outgrown the seat
(see page 20).
Your child can be
rearward facingrearward facing
OR forward facingforward facing
if their shoulders are
between the lower
and middle marker.
Britax
recommends
using this restraint
in rearward
facing as long as
possible.
Your child MUST be
rearward facingrearward facing if
their shoulders are
below lower marker.
Lower Height
Marker
Upper Height
Marker
Middle Height
Marker

Instructions for Installation & Use
18
SHOULDER HEIGHT MARKERS
IMPORTANT: Follow this advice.
OR

Instructions for Installation & Use 19
SHOULDER HEIGHT MARKERS
OR
Middle Height Marker
Lower Height Marker Middle Height
Marker
Lower Height
Marker
Lower Height Marker
Upper Height
Marker
Middle Height
Marker
Child Use (Forward Facing)
Older Baby (Rearward Facing) Older Baby (Forward Facing)
Newborn (Rearward Facing)

Instructions for Installation & Use
20
When your child has outgrown this seat, you can use:
• Or a dedicated booster seat with vehicle lap-
sash seatbelt until 6 to 8 years of age or
until 8 to 10 years of age (or seatbelt and
compatible child harness).
• A convertible booster seat with in-built harness
until approximately 4 years old and then as
a booster seat with vehicle lap-sash seatbelt
until approx 6 to 8 years of age (or seatbelt
and compatible child harness).
• A harnessed child seat with in-built harness
suitable for children approximately 6
months to 8 years old.
OUTGROWN YOUR CHILD SEAT