Waterproof Sports Earphones Wireless Neckband Headset Stereo Noise Cancelling Earbuds with Built in Mic, up to 12-Hours Play-time. Water/Sweat resistance. Built for your active lifestyle, our Encore S2 headphones are rated IPX34 and can withstand dripping sweat. DSP technology brings high-quality sound. With Digital Signal Processing (DSP) technology, Tronsmart Encore S2 can reduce noise and increase call resolution by 30%. Bluetooth 4.1 Connectivity. More energy-efficient, stable, and faster transmission speed (lower latency) than Bluetooth 4.0. Very low standby power consumption with the fast&safe pairing. Powerful Battery, Incredible Playtime. The S2 Provides an impressive 12-hour playtime on a single charge, allowing you to use them for a week's worth of activity.