Features:- Bluetooth V4.1- Portable lightweight and sweatproof design- Built-in microphone- Built-in rechargeable Li-ion battery- Multipoint pairing (connect 2 bluetooth device) Specification:- Wireless version: CSR V4.1 + EDR- Wireless profiles: Headset， Hands free， A2DP，AVRCP- Operating distance: Up to 10m- Talk/music playtime: Approximately 4-6 hours- Standby Time :150 hours- Charging time: Approximately 1.5 hours- Charging Port: Micro USB- Colour:Red Package:1 x Sport Bluetooth Headset1 x USB charger cable4 x Ear rubber4 x Ear hook