Bluetooth connect with two phone simultaneously . Built-in microphone,handsfree . Support music play/pause . Micro-USB charging connection . Supports Profiles: A2DP, HFP,HSP AVRCP . Talking Time: ? 5hours . Continous Music playing time: about 4-5 Hours . Charger time:about 2 hours . Standby time:about 100 hours . Effective range:about 10 meters . Frequency range: 2.4026 GHz - 2.480 GHz . Transmitting power : Class 2 . Battery capacity: 80mAh . Pair with Bluetooth Devices a: Long press "MFB"(Multi-function button) for about 6 seconds , till Red and Blue LED indicator light flashing alternately the headphone will report "Ready to pair". b: Enable the Bluetooth function of the device and search for available Bluetooth devices, then select "S80" from the search results. c: the Red and Blue indicator will stop flash, and the headset will report, means it is connected. Package Included - 1* Bluetooth Headset , 1* USB Cable & 1* User Manual