1. Bluetooth V4.0
2. Built-in microphone
3. 3.5mm audio cable
4. Adjustable headband
5. Built-in 400mAh rechargable lithium-ion battery
5. Charging time 2.0 hours, standby 360 hours, talk/music upto 12 hours
6. Driver: 40mm/32Ω
7. Sound pressure level: 102±3DB
8. Frequency range: 20-20,000 HZ