GDK-001 Product specification 
 
Bluetooth Version: Bluetooth:V2.0+EDR
Chipset: CSR Chip
Support Profile: Headset,Handfree Profile
Compatibility:  most of bluetooth mobile phone
Range of frequency: 2.4GHz-2.480GHz
Power: Class2
Range: 10m

GDK-001 DC-Power specification
 
DC power: 100-240V
working voltage: 3.7V
Battery: built-in li-ion
Charging time: 3H
Talk time: Up to 4H
Standby time: Up to 60H