Sony SRSX11 Ultra-Portable Bluetooth Speaker (Red) Size-defying sound with 10 Watts of digital amplification, Single speaker w/dual passive radiators for big sound, Speaker Add function (Stereo or Double Modes), Bluetooth audio streaming with SBC support Convenient One-touch listening technology, Enjoy up to 12 hours of battery life with a single charge, Easily take calls using the speakerphone functionality Convenient speaker charging via micro USB input, Supplied Silicon Accessory Strap, Available in 5 fun and exciting colors