The Soundfreaq SFQ-02-IW Sound Step is wireless audio system that can dock an iPad， iPhone or iPod device. It features a High Fidelity Sound Signature sound profile that delivers a natural bass response and superb vocal clarity. The Sound Step's Bluetooth wireless audio streaming allows you to listen to music or audio from a smartphone or laptop. While an additional USB charging port provides variable power up to 2.5V to charge mobile phones.