*Frequency
2.4GHz ISM Band
*System
GFSK modulation
*Mode
Stereo
*Effective range
10M-15M
*Voltage
3.7V DC (rechargeable 200mAh Grade-A Li-ion battery)
*Electric current
Typ 45mA
*SNR
90dB@1KHz
*Mic Frequency response
50~80000Hz
*Headphone Frequency Response
20~20,000 Hz
*Headphone continuous use time
more than 6 hours (full charge)