Features: Universally compatible with most BT devices such as for iPhone/iPad/iPod, Samsung galaxy S4/S3/Note 2, other Android smartphones, tablet PCs, etc. Can work as a wired speaker without BT function by using the 3.5mm auxiliary cord. Built-in microphone enables you to answer a handsfree call and realize last number redial. Convenient buttons for volume adjustment, music and hands-free call control. Wireless BT connection, keeping you from the hassle of tangled wires. Offers a wireless connection range of 10 meters (33 feet). Powered by built-in rechargeable battery via mini USB port. Superb stereo sound quality and excellent bass. Four blinking shining colors make the music time cool. TF card supported. FM function supported.