00% brand new!! Compatible with Advanced Bluetooth Version 4.0+EDR System Cellphones、 devices providing the Bluetooth Headset. Deliver you powerful bass and high quality audio experience of stereo sound with Bluetooth technology. Featuring an unique neck-strap and Ultra light weight designed Specially for easy carrying for all day comfort. The flexible、 bendable、 neckband style ensures a 100% comfortable fit. Easy to operate. You can play、 skip and pause music、 control volume and pick up calls. Vibration alert on power on and coming calls、 and the battery level of these headsetswill be displayed on your cellphone. These headphones also supports Easy Magnetic earpiece storage、 Noise reduction、 & Echo cancellation. Features: Changing voltage: MICRO USB 5V Bluetooth working range: About 10M Frequency range: 2.401-2.480GHz Frequency response: 20HZ-20KHZ SNR : S/N－95 About 10 hours play time About 10 hours talk time About 360 hours standby time Less than 2.5 hours changing time Instruction: You could also enjoy your music while sporting、 Short press the + or - button to volume+/volume-、 Long press the +/- button to choose previous or next song. Attention: (Make sure there is no barrier between device and bluetooth including human body. If there is some distance、 you need to turn your headset towards one side of the cellohone.) Package Includes 1 X Wireless Bluetooth Headset (no retail box) 1 X Micro USB Cable 1 X User Manual 4 X ear rubbers