Marshall Emberton, Bluetooth Speaker, Over 20 hours of playtime, IPX7 certification, Power: 2x 10 watt amplifier (class D), True stereophonic, Frequency range: 60 - 20,000 Hz, Max. Sound pressure level: 87 dB SPL @ 1 m, Bluetooth Standard V 5.0, Multi-directional control button, Dimensions: 68 x 160 x 76 mm,