Stable triangle shape structure, exquisite and attractive metal grid. A2DP stereo Bluetooth transmission. 4W strong output power with outstanding sound quality. Saves you from the hassle of tangled wires Waterproof, Dustproof, Anti-scratch,Shockproof, suitable for both indoor and outdoor exercise. 1500mAhigh capacity built-in rechargeable battery. Playtime lasts for 5 hours at least Aux in function. Support all digital audio device with 3.5mm jack, such as iPod/iPhone/ipad, MP3, Computer, Notebook, PSP.... So buy this Original EARSON ER-151 Waterproof Shockproof Bluetooth Speaker For iPhone 6 Smartphone Now Only $18.99.