1.Noise concelling bluetooth headset . 2.Stereo Surrouding Audio, Bulit-in Microphone. 3.Foldable and adjustable neckband . 4.Transfer a call between the mobile phone and the headset. 5.Power re-charged ! 6.Milti-color for your option: black, red, blue,green.,grey, white. Brand Name: OEM or techcool Style: Headband Communication: Wireless Connectors: 3.5mm Use: Mobile Phone, Mobilephone, cellphone, computer, Ipad, MP3, PS3 Function: Bluetooth, Microphone, Noise Cancelling Place of Origin: Guangdong, China (Mainland) Color: Black, Silver Sound mode: Stereo bluetooth protocol: A2DP HSP HFP AVRDP Distance: 20m bluetooth Version: 4.0 color: black with silver Rated voltage: 4.5VDC working time: up to 12 hours Stand by: 180 hours material: aluminum+plastic Button functions:V- /next music/V+/previous music /pause/play Bluetooth protocol standards:Bluetooth V4.0+EDR Button functions:V- /next music/V+/previous music /pause/play Receiver distance:10m / 360�° Battery:3.7V/110mAh lithium-ion battery Charging time:Less than 2.5 hours Successive working time:About 3 hours Standby time:120 hours Speaker diameter:�¦10mm Impedance:16�© S.P.L:106dB S.P.L.at 1KHz MIC type :Capacitive Microphone Unit:4*1.5mm Frequency Response:20Hz-20,000Hz