Bluetooth 4.0 NFC Spesker, CEStore Portable Rechargeable Stero Speaker Waterproof Dustproof and Shockproof for iPhone 6S 6 Plus 5 SE iPad Air Mnini Samsung Galaxy Tablets Laptop-Green Waterproof, dustproof, anti-scratch, shockproof, high temperature resistant handsfree speaker Built-in 3600 Li-ion rechargeable battery power bank NFC technology (near field communication) for easy and instant pairing (NFC function only for Android); HiFi and clear loud sound output; built in microphone allows you to answer calls while listening to music Metal hook Loop for easy attachment to chain, wire, karabiner, clip, etc Note:Do not soak in water; ut only support water mist- proof