MingHe Outdoor Waterproof Bluetooth Speaker Shower ,Mini Portable Wireless Speaker for Outdoor Travel Cycling Hands-Free Function E33(Blue) 1 Waterproof Shockproof: Portable Bluetooth Speaker with Aluminum Alloy Hook Loop, Perfect for Outdoor Activity like Climbing Hiking and Bicycle Cycling. 2 Fully Compatible:Support Bluetooth Connection & Aux Cable & TF Card. Applicable to almost all device like MP3/MP4/cellphones/computers/tables. 3 Built-in Mic: Hand free cell phone conversation. Subwoofer deep and delicate treble in loud and clear, add spice while enjoying music, bring you better stereo experience. 4 3.0 Bluetooth Technology: Outstanding connection range of up to 33 feet, power saving, low consumption, faster and more stably transfer. 5 NFC function:Support NFC functions, one touch to start your Bluetooth connection and music time after setting once.