Marshall Emberton Forest, Portable Bluetooth Speaker, True Stereophonic, Over 20 hours playtime, IPX7 certification, 2 x 10 Watt amplifier (Class-D), Frequency range: 60 - 20,000 Hz, Maximum level: 87 dB SPL @ 1 m, Bluetooth standard V 5.0, Multi-directional control knob, Dimensions: 68 x 160 x 76 mm, Weight: 0.7 kg, Colour: Green, Includes USB charging cable