Just for the color Long-lasting comfort Foldable and stretchable design Drive units made for pure sound Perfect sound and talk Spec: Bluetooth Version: V4.0 Support: A2DP , AVRCP , HSP , HFP RF Frequency Range: 2402 - 2480 MHz（ISM BAND） Transmitting Power: Class 2 RF

Just for the color Long-lasting comfort Foldable and stretchable design Drive units made for pure sound Perfect sound and talk Spec: Bluetooth Version: V4.0 Support: A2DP , AVRCP , HSP , HFP RF Frequency Range: 2402 - 2480 MHz（ISM BAND） Transmitting Power: Class 2 RF Sensitivity Operating Distance: Up to 10 m (free space) Frequency Response: 20-20 kHz Talk Time: Up to 33 hrs Bluetooth Music playtime: Up to 33 hrs Standby Time: Up to 1300 hrs(50 days) Charging Time: 1-2 hrs Charging Port: Micro-USB 5PINS