Sonics the most trusted brand in Electronics Gadgets.Latest Bluetooth 5.1 technology you will get 2 x faster transmission speed and more stable connection without signal loss or music dropouts. Turn ON the Sonics NB-2310 Neckband earphones, they will connect automatically, then only one easy step is required that is to set mobile phone Bluetooth and pair the earphones. Two sizes of flexible silicone tips with the inter taper, conforming the shape of your ear, securing Sonics NB-2310 in place and creating an exceptional seal for superior noise cancellation. Widely compatible with Bluetooth-enabled devices.Experience music, movies, podcasts, calls, and more in a whole new way. Sonics NB-2310 provides a truly authentic sound and powerful bass performance with large size speaker driver the drive area is 2 (12MM DYNAMIC DRIVERS) times than the normal drive area.FEATUERS :240 Hours standby time with the use of Massive Battery in Sonics NB-2310 neck band makes it easy for continuous playtime and calling up to 16 Hours . Sonics NB-2310 neck band with inner Nano-coating makes it practically waterproof for sports to prevent water. Ideal for sweating it out at the gym or during walks/Marathon.Enjoy fast charging, to fully charge the rechargeable case in less than 1 hour via USB TYPE-A fast charging Technology.