U&I Alarm Series Wireless Multifunctional Neckband With 40 Hours play time and advanced dynamic drive units bring you unparalleled music experience with high bass. Its multi-function Integrated controls lends an intuitive listening experience with volume increase and Decrease and Stop and Play buttons 40Hour Playtime: Tune Charge comes with an ultra long playback time of 40 hours and Enjoy thumping bass on Tune Charge with the press of dedicated bass booster button. Compatible with all OS, all Bluetooth enabled Smartphones, Laptops, PCs, Tablets, Smart TVs, from all the brands In Line Control feature allows you to skip tracks, pause, and even take and hang up phone calls, you don’t even have to touch your device to complete a variety of essential functions