Incredible sound quality from a small package, Easy wireless connection-works up to 30 feet away, Works with all Bluetooth-enabled devices: smart phones, tablets, and most notebooks, Lithium-ion rechargeable battery provides up to 4 hours of wireless play-no need to buy batteries, Simple on/off switch on the panel of the unit. Multiple Input options- Sub Flash Disk,TF Card, FM Radio, Aux-In, Answer Calls via In-built Microphone, Specifications: Bluetooth profile - HSP, HFP, A2DP and AVRCP Bluetooth operating distance - 10 meters (equal to 33 feet)