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
Working voltage ...............................................................................................................3.7V
Working 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/PA
Signal to noise ratio ........................................................................................................55dB
USB Dongle specification:
Working voltage ..................................................................................................................5V
Working current .............................................................................................................55mA
Transmitting power
......................................................................................................
<+6dBM
Transmitting range ...........................................................................................................10M
Modulation mode ..........................................................................................................GFSK
Frequency range .................................................................................2404MHz ~ 2476MHz
Interface...........................................................................................................................USB
