Breett Bluetooth Headset, Wireless Sport Neckband Bluetooth Earphone, Vibration Neckband Style Headset(Black) Bluetooth headset, sport bluetooth headset, it&rsquo;s compatible with most cellphone and devices with bluetooth capabilities. Bluetooth Chipset V4.0, newest technology and high quality, extend battery life. Unique around-the-neck design that&#39;s lightweight and comfortable for all-day use. Convenient power slide switch, intuitive talk and music controls, battery status check and vibrating call alerts. Noise reduction and echo cancellation technologies to block out background noise and improve voice quality. It delivers a high quality audio experience in stereo sound. Music and phone conversations sound better with enhanced audio and bass response that compliments a wide range of music genres. Music retains its full digital integrity, and speech sounds more natural. Please refer to the Setup instructions in the product description before use.