Bluetooth V2.0  
BlueCore 04  
Frequency: 2402MHZ-2481MHZ  
Transmitted Power: Class 2 (Max 4 dBm)  
Received Sensitivity: - 77dBm  
Charging Power: 5V DC 500mA  
Working Voltage: 3.7V  

Rechargeable Li-ion Polymer Battery  
Standby Time: 150 hours  
Talking time: 7 hours  
Working distance: 10 M  
Packing Details  
Packed with Gift Box and USB charging cable and instruction manual.