I3C Waterproof Bluetooth Speaker Outdoor Sport Portable Speakers Shower Bluetooth 4.0 Speaker, Light Weight,Built-in Microphone,Hook,Compatible with All Audio Devices - Black Full, High-Def Sound: Enjoy an impressively full sound quality and robust bass realized through a 3W audio driver and passive subwoofer. Perfect sound quality and effect, when you go out to enjoy unfettered music anywhere stereo Bluetooth transmission. Incredibly Compact: This ring box-sized bluetooth speaker fits easily into your jacket pocket or the small side pocket of your backpack. Waterproof IP66, Dustproof, Anti-scratch, Shockproof,Rechargeable, suitable for both indoor and outdoor exercise. Aux in function support all digital audio device with 3.5mm jack, such as iPod/iPhone/ipad,Cell phone,MP3, MP4,Computer, Notebook, PSP; Waterproof Bluetooth Speaker Outdoor/Sport Portable Speakers Shower Bluetooth 4.0 Speaker.