Specifications:
1, Bluetooth Version: V4.0, Chipset: CSR
2, Support Profile: HSP V1.2,HFP V1.6,A2DP  V1.2,AVRCP V1.4
3, Transmission distance: 10M
4, Frequency Response: 20Hz-20KHZ
5, Build-in speaker mic;
6.   Optional: NFC (Near Field Communication)
Features:
1. Allow 2 Bluetooth devices connected simultaneously
2. Support APTX,AAC nondestructive sound transmission standard Bluetooth 4.0 Headset 
3. It comes and combines wireless & wired in one
4. HIFI timbre and HIFI Stereo sound quality
5. Large, breathable cushioned ear cups and an adjustable headband for complete comfort and luxury
6. Compatible with most of bluetooth enable audio devices,including computer/laptop and Bluetooth enabled mobile phone,MP3/MP4,IPOD,PAD,etc.