No More Tangled Wires ! Perfect sound quality and bass effect, allowing you enjoy music anywhere ! Stable triangle shape structure, exquisite and attactive metal grid; A2DP stereo Bluetooth transmission; 4W strong output power with outstanding sound quality; 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 and PSP, etc.; Playtime lasts for 5 hours at least; Passed the simulation environment test, you can use it in the rain without any problem; Note: Does not support hands free; Specifications: Loudspeaker Output : 2W x 2; Speaker unit: 1.5\" x 2; Impedance: 4ohm; Frequency response: 80Hz~20KHz; Power supply: 1500mA battery; Unit size: 150 x 56 x 56mm; Pairing passkey or PIN: 0000; Attention: This product was designed for water resistant and you can use it in the rain without any problem but please don't put it into the water