Description:Support for Bluetooth & Wireless transmission.Built-in Microphone，enjoying hand-free call.Adopt high quality audio decode chip，let you experience perfect sound quality.Support Iphone， ipad and most of Bluetooth audio deviceBuilt in li-ion rechargeable battery With voice reminder function in each modeCall pick up/hang up function， last call re-dialBuilt in TF card slot ，Support TF card playingSupport USB Music Playing， audio input by USB data cable.Waterproof IPX6， shookproof and dustproofSpecification:bluetooth Version: 4.0RF range: 10MFrequency response: 100Hz-20KHzPlayback time: 3-5hours ( in maxmium sound )Charging time: about 6 hoursCharging input: 5.0VMaterial: ABS+Electronic Elements+MetalSize: 9.5*8.5*4cmColor: Camouflage Color，BluePackage Included:1 x Bluetooth Speaker，1 x USB Charger，1 x Instruction，1 x Hook