Bluetooth Version: 2.1 
Bluetooth Profile Version: HSP/HFP/A2DP/AVRCP 
Transmitting Power: Class 2 
Working Distance Range: 10M 
Frequency Range: 2.4020 GHz - 2.4800GHz 
Rechargeable Battery: Lithium Polymer: 300mAh 
Output Voltage: DC 5.0V 300mA 
Charge Time: up to 3 hours 
Talk Time: 10 hours 
Listen Time: 6 hours 
Standby Time: 135 hours

Main Features:                                                                                                                                  1.Small Size with Neck Band Style  
2.Super Comfortable 3.Foldable & Flexible