Iselector Wireless Bluetooth Speaker NFC IPX6 Water Resistant Shock Proof and Dust Proof Outdoor/Shower/MP3/PC Speakers with Build-in 2000mAh Battery(Black) Features Near Field Communications (NFC) technology which allows for easy, one-touch pairing by simply tapping your NFC-enabled Bluetooth smart device on the speaker IPX6 Splash-Proof & Shock-Resistant Design - Built-in 2000mAh Rechargeable Battery - Easy-Push Button Controls - Impressive Bass Output Built-in Li-ion battery means you're free to place your speaker almost anywhere you please, plus the battery can be easily charged via a standard micro USB connection Metal Hook Loop for Easy Attachment to Chain, Wire, Karabiner, Clip, etc. Effectively Recreates Lows, Mids and Highs Built-in Bluetooth Technology - Stream Music Wirelessly - Works with Virtually any Bluetooth-Enabled Device (Smartphones, Tablets, PCs, MP3 Players, etc.)