Specification:
Bluetooth Version: V4.0
Drive unit: 40MM
Range: 33 feet (10 meters) 
Talking Time: Around 6-8 hours
Playback Time: Around 6-8 hours
Charging Time: 2 hours
Charging Voltage: 5V
Battery Capacity: 300mAh
Dual mode: Wireless & Wired
Resistance:32Ω±15%
Wire Connectors:3.5mm
Line Length:about 5 feet /1.5m
Sensitivity:108±3dB
Mic Sensitivity: -42±3dB
Frequency Range:20-20000HZ
Mic Frequency Range:100-10KHZ
Size: 6.7*6.3*2.9 inch
Ear Pad Size: 2.7*1.3*0.6 inch
weigh: 5.4oz/155g 
Function: For Mobile Phone,Sport and Study

Package Include:
1x BT-08 Bluetooth Headset
1x 3.5mm Audio Cable
1x USB Charging Cable
1x Packing Box
1x User Manual