YINENN 760 Stereo Wireless Bluetooth 4.0 Neckband Style Headset for Smartphones & Tablets - Black Bluetooth Technical: Compatible with Advanced Bluetooth Version 4.1+EDR System Cellphones, devices providing the Bluetooth Headset Comfortable,flexible and light neckband made of ultra-light shape memory alloy. Easy to handle ear set with magnetic properties Compatible with most cellphone and devices with bluetooth capabilities. High quality sound with HD speaker and enhanced BASS effect 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 Come with world famous brands CSR4.0 Bluetooth Stereo Bluetooth chips Extended battery life !-Talk/Standby/Music Play Time : Up to 15 / 400 / 10hours