W770 Wireless Headset User Manual
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X. PRODUCT PARAMETER
Headset:
Drive unit ............................................................................................................... 2 x 40 mm
Frequency response ........................................................................................20Hz ~ 20KHz
Impedance ................................................................................................
32Ω±15% @ 1kHz
Sensitivity (SPL) ...............................................................................
103±3dB/1mW @ 1KHz
Signal to noise ratio ........................................................................................................
65dB
W
orking voltage
...............................................................................................................3.7V
W
orking current
.............................................................................................................
58mA
Battery capacity
.........................................................................................................
380mAh
Continuous working time
................................................................................................... 6H
Charging time
.................................................................................................................
2.5H
Input power ...................................................................................................................20mW
Maximum input power ..................................................................................................
45mW
Net weight of headset
.....................................................................................................
160g
Net weight of USB Dongle
..................................................................................................6g
Microphone:
Frequency response ......................................................................................
100Hz ~ 10kHz
Impedance ..............................................................................................
2.2kΩ±10% @ 1kHz
Sensitivity ................................................................................
-38±2dB @ 1kHz 0dB=1V/
P
A
Signal to noise ratio ........................................................................................................
55dB
USB Dongle specification:
W
orking voltage
..................................................................................................................
5V
W
orking current
.............................................................................................................
55mA
Transmitting power ......................................................................................................
<+6dBM
Transmitting range ...........................................................................................................
10M
Modulation mode .......................................................................................................... GFSK
Frequency range ................................................................................. 2404MHz ~ 2476MHz
Interface
...........................................................................................................................
USB
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