Korus Audio M20 Bluetooth and SKAA Speaker (Black) Exceptional audio clarity with a 360-degree Wide Stage Acoustic design that can get LOUD with low distortion Built to go anywhere: Water resistant with rubber body for extra grip and scratch resistance with built-in Carabineer Clip; Fits in your hand and weighs only 1.2 lbs. Includes premium Carry Case Speakerphone feature allows you to seamlessly switch from music to phone calls Switch from Bluetooth to SKAA wireless to connect up to 4 Korus speakers together with farther range -up to 85 ft. indoors and 175 ft. outdoors 3.5 mm stereo input