Specifications: 1. Bluetooth version: V4.0 + EDR compatible with V3.0, V2.1, V1.1 2. Chipset: CSR 3. Transmission power: Class2 4. Transmission frequency: 2.4GHz 5. Transmission distance: 10 meters or more 6. Talk time: 4 ~ 6 hours 7. Standby time: 120 hours 8. Support file format: A2DP music player, headset and hands-free mode   Features 1. Comfortable Feelings 2. Bluetooth 4.0 version, compatible with all mobile phones 3. A2DP, support music player 4. Multipoint Connection, while connecting two phones 5. Siri Control, intelligent voice control 6. Voice prompts   Package Included: 1* Bluetooth Headset Earphone 1* Charging Line 1* Ear Hanging 1* Manual