Accutone DT30 User manual

DT Series Anti-Radiation Headset for DECT Telephones
User Manual
www.accutone.com
© Copyright 2006 Accutone Technologies Limited, All rights reserved.
Do not copy or re-distribute any contents.
Accutone and the logo device are registered trademarks of Accutone Technologies Limited.
DT30
Photo credit: Benjamin A. Ward

DT-series Anti-Radiation Headset for DECT Telephones
All DECT cordless telephones emit the same type of pulsed microwave radiation (about
1.8 GHz or higher) as ordinary GSM mobile phones. Emission can be about 6 V/m within
one meter of the base unit. The radiation is continuously generated for as long as it is
plugged in. Dr. Lennart Hardell*’s paper on mobile phone use and brain tumours shows
a dose response increased brain cancer risk for long-term use. A DECT phone is a
®
mobile phone, so for health concerns Accutone has developed a series of Anti-
radiation headset, for both mobile phones and DECT phones.
The DT30 anti-radiation earwear headset for DECT phones shares the same
technology that have been tested by two independent laboratories with results showing
Specific Absorption Rate (SAR) value obtained with the headset used normally showed a
99.5% reduction compared to normal use of the phone. Furthermore, with the headset
cable wrapped around the phone’s antenna - even in the worst case scenario - the
headset reduced the SAR in the head by a 96% compared to the normal use of the
phone. All these results are approved by BABT Product Services.
Aside from the anti-radiation design, the DT30 is also the first of its class to house a full
aluminum casing with multiple-adjustment points and surge protection in it’s ASP
circuitry, mute button for privacy, volume control, impedance compensator to fit all
phones and high-end professional speaker with noise-canceling microphone.
Lennart Hardell*
Dr Lennart Hardell is professor in oncology and cancer epidemiology at the University Hospital in Orebro, Sweden.
Most of his research has been on risk factors for cancer such as exposure to pesticides and persistent organic
pollutants. Examples of such agents are herbicides, dioxins, PCBs and brominated flame-retardants. During recent
years he and his co-workers have studied use of cellular and cordless telephones and the risk for brain tumours. He
works also as a consultant at the Department of Oncology at the hospital.
Identifying Key Component to your DT30 headset
DT30 headset for DECT phones
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1. Soft-rubber earhook
2. Microphone-boom ball joint
3. Aluminum speaker chamber
4. Mute switch
5. Speaker volume control
6. 2.5mm plug to mobile / DECT
7. Microphone gain setting
8. Anti-radiation module
9. Transparent sound tube
10. Clothing clip
1. Multiple-point Adjustments.
DT30 Anti-Radiation Headset
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User Manual
DT30
®
Accutone ’s DT-series headset include DT30, DT808 and DT818, for more information,
please visit www.accutone.com.
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¬Move the earhook vertically up and place on ear, flip speaker chamber
horizontally to fit in ear. Push the earhook vertically down to fit ear tightly.
¬Transparent Sound Tube is rotatable and also extendable.

Almost all DECT cordless phones in the market shares the universal 2.5mm jack for it’s
headset port. (However, not all DECT phones have a headset port, please check the
user manual of the DECT phone to see if the feature is available).
Locate the headset port of the DECT phone (check your manual if needed), and simply
insert the 2.5mm plug into the jack to complete connection.
2. Connecting headset to your DECT phone.
3. Proper Wearing Method.
Aside from containing the Anti-radiation circuitry, the inline controller includes various
switches. The Microphone Mute Switch offers user quick privacy by muting the
microphone pick-up. Slide the switch to position (A) for muting and back to position (B)
to go back to normal speaking mode.The Microphone Gain Switch (C) acts as a
microphone pairing between the headset and your DECT phone. It is not designed to
be a volume control, hence user should only be required to make this setting once.
Notice the three positions marked by different sizes of circle, the left-most and smallest
circle indicates lowest microphone gain. Starting with the leftmost position, place a call
and ask the person on the other side which position has the optimum sensitivity level
A
B
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User Manual
Microphone Gain & Mute Switch
Speaker Volume Control
E
The Speaker Volume Control (E) dial on the side of the inline controller allows user to
adjust the incoming volume. Increase volume by turning the dial towards the speaker
icon, and vice versa to decrease volume.
C
D
DT30 Anti-Radiation Headset
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E
4. Understanding the In-line Controller.
Caution: Make sure you switch to the leftmost position (D) before you make this
setting, because different DECT phones have very different microphone
sensitivity, if the microphone gain is set too high, the headset speaker may
SQUEAL, which can cause damage to the user's ear and the headset.
!
¬Standard H30 / DT30 are suitable for right ear usage only.
¬Position the microphone capsule approximatley 1/2” from your mouth for
optimal performance. The tip of the should be facing towards your mouth.
1/2”

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DT30 Anti-Radiation Headset
GENERAL CHARACTERISTICS
Speaker 15mm diameter
Microphone Transparent Sound Tube
Cord Length 1.5 meter
Plug 2.5mm Audio
SPEAKER CHARACTERISTICS
Speaker Type Dynamic Speaker
Rated Impedance 32 Ω
Frequency Range 300 ~ 3500 Hz
MICROPHONE CHARACTERISTICS
Microphone Type Electret Condenser Microphone
Impedance 2200 Ω
Sensitivity -40 dB/PA
Directivity Omni-directional
Operation Voltage 2 V
Current Consumption < 500 µA
Recycling & Warranty
Please read the following safety instructions before using your H30 / DT30
professional earwear headset.
WARNINGS
- Listening with the device at high volume may damage your hearing.
- Adjusting the volume for the microphone or speaker too high may cause
squealing (feedback noise) and can damage your hearing.
- Device must be connected according to the method shown in this
manual.
- Place product far away from water, fire, extended exposure of direct
sunlight or magnetic field, and places of excessive dust, moist, rain, shock
or electromagnetic radiation.
- Do not drop this device or subject it to external shock which may cause
malfunction.
- Do not dissemble or attempt to open up the casing under any
circumstances, contact your distributor or retail outlet on repair or
replacement.
Whenever unplugging the 2.5mm plug from the DECT phone, apply force
to the plug part only. Jerking the cord instead of the plug may cause damage
to the product.
- Operating and storage temperature is 10ºC to 40ºC.
- Do not use liquid cleanser or aerosol cleanser as they may damage the
device or the finishing of the device. Use only a dry cloth to clean the
external portions.
- Prevent the headset from coming into contact with moisture or liquid, to
protect against damage to it or injury to you.
© 2008 Accutone Technologies Limited. All rights reserved. Accutone and the
logo design are trademarks of Accutone Technologies Limited.
RECYCLING
The H30 / DT30 headset is WEEE and RoHS compliant and must be recycled or
disposed properly. Contact your local recycling center for proper disposal.
WARRANTY
Do not remove or alter any serial number print or sticker on any part of the
device, as this will automatically void the product’s warranty,
5. Detailed Technical Specifications
5. Recycling & Warranty
6. Precautions & Warnings
6. Trademark & Copyright
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