Hearing Products International EchoVoice EV7 User manual

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Portable Digital Voice Amplifier
EchoVoice® EV7™
User Manual

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The EchoVoice® EV7™ is a compact, lightweight digital voice amplifier. This product can
enhance even the faintest of voices with minimal effort required. The EchoVoice® EV7™ has
power with a max 10W output and is powered by 4000mAh battery which provide extremely long
working time (up to 35 hours).
Product functional features:
1. Built-in high-capacity rechargeable lithium-ion batteries 4000mAh
2. Supplied with a lightweight headband type boom microphone and a transdermal (throat)
microphone.
3. Digital amplification technology, rated power is 5W and max power is up to 10W.
4. High performance double NdFeB foam edge loudspeaker to provide high quality sound.
5. USB-C interface, it can be charged with 5V power supply and computer USB port.
6. Simple and easy to operate volume control.
7. Support AUX-in, support MP3, WMA, WAV files.
8. Exquisite and fashionable design, comfortable, simple function, simple operation, easy
portability such as hanging on shoulder or waist.

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Function illustration：

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Keys and Ports instruction：
Mic-in
Microphone input socket for 3.5mm single jack mono/stereo
microphone
Aux-in
3.5mm audio input, support music play, insert audio cable to
play music automatically.
USB-C
Charging
Port
Charging port supports charging through 5V power supply and
computer USB port.
Dial
Volume
Switch
Rotating the dial can switch on/off the amplifier and adjust the
volume. Rotate the switch clockwise to turn on the amplifier
and increase volume, rotate the switch counterclockwise to
decrease volume till turn off the power.

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Operation description：
1. Power switch on/off: Rotate Volume/Power switch clockwise to turn amplifier ON. When
amplifier is switched ON the red LED should illuminate. Rotate switch anti-clockwise to
switch amplifier off.
2. Volume control: Rotate the Volume/Power switch to adjust the volume to the comfortable
level. Rotate clockwise to increase the volume or counterclockwise to decrease the
volume.
3. Microphone amplification: Before inserting microphone always switch the amplifier OFF.
Place the microphone over your head (boom mic) or on your neck (transdermal mic), adjust
the microphone position and keep at least 50cm distance from amplifier to avoid feedback.
Then insert microphone into microphone socket and switch amplifier ON.
To position the transdermal(throat) microphone correctly for best amplification place your index
finger in your ear, move yourindex finger towards your throat and when you reach the centre of
your neck this is normally around the “soft spot” which produces best amplification. Placethe
microphoneabovethis“soft spot”.Turnthevolume controldownto low initially, andthenincrease
it gradually.
4. Aux mode: To be able to connect amplifier to external audio source please use AUX-IN

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socket. amplifier can be connected to computers, mobile phones, PAD, MP3，MP4 or other
devices through the 3.5mm AUX audio cable. Please do not connect external audio source
to Mic Input as it may damage the amplifier.
5. Charging: Amplifier should be charge by using USB-C cable. It can be charged by USB
power adapter provided in the set (recommended). It can be also charged by PC USB
socket(5V), 5V mobile phone charger, or a mobile power supply device (5V) etc.
The indicator flickers once per second when it is being charged. When battery charged in 80%
LED will illuminate permanently. To fully charge please carry-on charging for one more hour.
LED will flash quickly when the battery voltage is low indicating the amplifier requires to be
recharged.
SAFETY INSTRUCTIONS AND PRECAUTIONS
1. Please follow the step-by-step instructions carefully!
2. The microphone should be placed 0.5to 1 centimeter from user’s mouth. Please do not remove
foam pad wind shield as it reduces the noise and make the voice clearer.
3. Microphone should not be place too close to the voice amplifier as it may cause feedback
noise. Please make sure microphone is directed to user mouth.

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4. EchoVoice® EV7™ can be only charged by 5V power source. Higher voltage can damage
the amplifier.
5. Please fully charge amplifier before first use as it will extend battery life.
6. Do not use in anenvironmentthat isdamp, wet, very hotor very cold.
7. To cleantheEchoVoice®EV7 and its accessories,use onlya soft cloth and an inorganiccleaner.
8. We recommend using the HearingProductsapproved mains adaptersupplied with this voice
amplifier.
9. Do not connectexternalaudiosignalsinto the MIC socket.
10. Whenusing theEchoVoice®EV7 basic safety precautionsshould always be
followed to avoid the risk of electricshock or personal injury.
11. Pleasereferallservicingto qualifiedpersonnelonly. Do not attemptto open the unit,this will
invalidate the warranty.
12. Note: if the serialnumbersor labelsare removedyour warranty is invalid.

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Packing List：
EchoVoice® EV7™ amplifier *1, 3.5mm audio cable *1, USB-C cable*1, Head Boom
microphone*1,
Strap*1, Transdermal microphone *1, Power supply USB 5V 2A *1, User manual *1
Product specification：
1. Technical specification:
Rated power
5W
Max power
10W
Speaker
3 inches 2 ohmic
magnetic speaker
Frequency response
120Hz-15KHz
Battery
3.7V/4000mAh, 2 lithium
batteries in parallel
Charging voltage
USB/DC 5V min. 1A
Charging time
4-6 hours
Using time
Up to 35-38hours
Size
91.1*101.5*37.8mm
Net weight
205.5g

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Replacement Parts:
Product:
Part number:
EchoVoice® EV7™ amplifier
4801
Power Supply USB 5V 2A
570-1012-01
Boom Microphone
480-1004-01
Transdermal Microphone
482
Audio Cable
910-1005-01
USB-C charging cable
to follow
Strap (belt)
n/a
Hearing Products International Limited
House, 26/27 Haigh Park, Stockport, SK4 1QR, England Tel: [phone]
Fax: [phone] www.hear4you.com
Hearing Products International Ltd. reserve sole right to alter prices, design and/or technical
specifications or colour without prior notice. EchoVoice® Instructions © Copyright Hearing
Products International Limited.E &O.E 05/21. Version 1.