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Charging The Batteries; Technical Specifications - Uni-Art HP4890A User Manual

900mhz wireless headphone

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CHARGING THE BATTERIES

1. On the headphone, press the "Power ON/OFF" Switch until the Power
Indicator is off.
2. To recharge the headphone batteries, place the headphone on the
transmitter, taking care to ensure that the Charge Contacts touch the
transmitter's charge prongs.
3. The charge process starts automatically and the Charge Indicator glows.
Be sure to charge new batteries for 24 hours before using them for the
first time in the headphone.
WARNING:
Never attempt to recharge conventional dry cells. Use the rechargeable
batteries supplied with the product as these batteries are specially designed
with side charging contact.
Never use another type of battery or non-rechargeable batteries to replace
the rechargeable (LR03/AAA) batteries supplied. When the headphone are
not in use, switch Off the headphone to avoid damaging the batteries.
The batteries must always be fully charged before use. An initial 24 hour
charge is required to guarantee an acceptable service life for the
rechargeable batteries. Always ensure that the headphone are switched to
the Off position while the batteries are charging.
IMPORTANT:
This unit should be operated with rechargeable batteries only. When
replacing the batteries or when disposing of the unit, always comply with
applicable laws relating to the disposal of batteries. Please place them in a
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proper disposal container to ensure that they are eliminated safely and in an
environmentally-friendly way. Thank you.
Only use rechargeable batteries of the type specified under the "Technical
specifications" heading.
The rechargeable batteries supplied with the headphone must absolutely not
be taken apart, disposed of in an open fire or short circuited.

TECHNICAL SPECIFICATIONS

Transmission mode
: UHF stereo
Carrier frequency
: Ch 1 : 915.48 – 915.55 MHz
Ch 2 : 915.98 – 916.02 MHz
Ch 3 : 916.48 – 916.55 MHz
Operating voltage
: Transmitter – 8 V 200 mA
Receiver – 2.4 V (two rechargeable batteries,
LR03/AAA size)
Frequency response
: 7 Hz – 10 KHz
Distortion
: <2%
Signal-to-noise ratio
: >50 dB
Channel separation
: 30 dB
Range
: 150 feet (open area)
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