Bluetooth Version:V3.0 Bluetooth Profiles:HSP, HFP, A2DP, AVRCP Mic Type:DSP noise cantion mic Intecom Distance:800 meters Talking Time:8 hours Standby Time:100 hours Charging time:3 hours Frequency range:2.4-2.48GHz Battery:Li-polymer Battery (500mA 3.7v)