Main Features: IPX7 waterproof: you can even submerge it in water; no more worrying about rains and spills, just enjoying the music feast at your pool party, beach party, or while taking a shower. 3 ways to play tunes: wireless Bluetooth streaming, 3.5mm cable AUX in or just plug in TF card, just for your ultimate convenience. Rechargeable Li-ion battery: built-in 2000mAh rechargeable lithium polymer provides 9 hours of playtime, can be recharged via micro USB. Rugged, durable exterior design: rubber housing allows your speaker to withstand all of your adventures. Bluetooth 4.0 technology: compatible with all Bluetooth-enabled devices. Portable: the integrated hoop lets you hang it on your bicycle or anywhere you like. 2 powerful speakers: you can immerse in your favorite music with the stereo bass sound.