YIKD Outdoor Sport water Bottle Bluetooth speaker 2 in 1 400ml Bottle Portable 10m Wireless Bluetooth 3.0 Speaker Support TF Card for Smart Phone -Blue Color Bluetooth music player, faster transmission speed, Bluetooth, a distance of ten meters, using Bluetooth 3.0 technology, applicable to all have Bluetooth enabled mobile phone, MP3, PM4, PSP and other audio equipment. Stereo subwoofer design, selection of the polarity of the portable large cylindrical cavity depth pot sound, compared to the shortcomings of the ordinary speakers sound flat dry, the riding of the man who can also in the movement to obtain more mellow and full, full of fresh music experience. Support TF card play IPX4 waterproof design, built-in rechargeable battery The speakers at the bottom of the Cup Coasters anti-skid, even in the bumps in the road also can effectively prevent the slippage of the glass: TPU sealing strip can be effective waterproof and dustproof Can choose two caps, more fashion, more personality, let you and I, outdoor special compass cap, let your outdoor cups speakers more diverse