[Ip67 Waterproof Speaker] I-venstar Wireless Bluetooth Nfc Mini Portable Speakers Bluetooth 4.0 Speaker with 12 Hour Playtime- Carabiner: Metal Hook Loop Idea for Outdoor Sports Travel Bicycle Cycling Climbing Camping Hiking Running Fishing(black) bluetooth 4.0, the NFC compatible receiving, it can be compatible for smart phones, tablets, PCs and other devices capable for streaming Bluetooth audio Great for outdoor and shower - The silicone cases and interface design ensure Shockproof, Dustproof Waterproof, level up to IPX67 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 Installed rechargeable lithium-ion battery delivers up to 10 hours of playing time on a single charge. Charges fully in just 2-3 hours / Rechargeable via USB cable (included). Built-in Bluetooth Technology - Stream Music Wirelessly - Works with Virtually any Bluetooth-Enabled Device (Smartphones, Tablets, PCs, MP3 Players, etc.)