Marshall Kilburn II Black, Portable Bluetooth Speaker, Loudspeaker equipment: 20 W Woofer and 2 x 8 W tweeter, Class D power amplifier, Frequency range: 52 - 20,000 Hz, Bluetooth Standard V 5.0, Input: 3.5 mm Mini jack for MP3 player etc., Volume control. bass and treble, Bass reflex cabinet, Water-repellent according to IPX2, Up to 20 hours running time with internal battery, Quick charge function (2.5 hours), Weight: 2.5 kg, Dimensions (W x H x D): 243 x 162 x 140 mm, Colour: Black