Logitech Ultimate Ears Boom 3 Wireless Bluetooth Speakers (984-001363) - Audio Maximum Sound Level: 90dbc, Frequency Range: 90hz - 20khz, Drivers: Two 2" Drivers And Two 2" X 4" Passive Radiators, Wireless Capabilities, Diameter: 73 Mm (2.8"), Height: 184 Mm (7.2"), Weight: 608 G (1.34 Lb)