G76 Technical parameter: Charge limit voltage:5.25 V Charging current:300mA Working current:RX mode:22mA TX mode: 42mA Shutdown current:1.6uA Charging time:about 45 minutes Working hours:RX mode: About 8 hours TX mode: about 6 hours Battery capacity:200mAh 3.7V(0.74Wh) Wireless sound processing:With technology and the Advance Audio Distribution Profile(A2DP) function Wireless frequency:2.402 to 2.480 GHz Support TF card capacity:less than equal 64G SupportTF card format:MP3,WMA,WAV,APE Wireless transmission distance:about 10M/33ft(noblocking) Effective range of Wireless microphone:0.5 to 2 m Colour:black Material:ABS Package Contents: 1 * audio receiver transmitter adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.