Bowers & Wilkins T7 Portable Bluetooth Wireless Speaker, Black (Certified Refurbished) B&W recertified products have been tested and updated to ensure they meet Bowers & Wilkins high quality standards. All recertified products come with a two-year warranty. T7 is a speaker you can pick up and play anywhere. Just charge it up, and it's good for 18 solid hours of playback. Stream audio directly from any Bluetooth-enabled PC, tablet or mobile phone, without the need for a Wi-Fi network. T7 uses Bluetooth aptX. Designed for the optimum balance of movement and stiffness, the T7's twin bass radiators deliver beats and bass lines with serious depth and impact. T7's rock-solid stability is thanks to Micro Matrix: a rigid honeycomb of interlocking cells that brace the cabinet and reduce vibration and distortion.