ULT Power sound - produces powerful deep sound and feel the bass. Deep bass boost for low-frequency sound and ambient lighting. ULT Power Sound button. X-Balanced Speaker. High efficiency tweeter and passive radiator. Sound Field Optimization. Water and dustproof. Up to 30 hours of battery life. Mic/guitar plug. Inputs and controls all on rear panel. Connect two ULT Field 7 speakers for stereo sound. Effortless Bluetooth pairing and Multipoint connection. USB Port - play and charge. Sony Music Center app. Fiestable app. Includes AC power cord.