- Soundboks Soundboks 4 Black, enhanced generation 4 audio experience with 20% longer battery life, powerful portable battery powered outdoor speaker system, Merus Audio Eximo® 3 x 72W, intelligent Class-D amplifier, up to 126dB, 2 x10 " subwoofer + 1x1" tweeter, connections: Bluetooth 5.0, 3.5mm stereo jack input, 2x XLR/jack combo input; 3.5mm stereo jack output; generation 4 battery (12.8V, 7. 8A Lithium Iron Phosphate) with 5 level LED display (included), 1x charger 110V / 230V (included), charging time 3.5 hours, 40 hours battery life at half volume/ 6 hours at full volume, in TeamUP mode connect up to 5 Soundboks via SKAA technology, App for control in AppStore resp. Playstore free of charge, weatherproof, robust, shockproof, temperature resistant in most climates, Easily detachable black grill, 35mm stand flange, dimensions: 660 x 430 x 320 mm, weight: 16,1 kg, for expansion optional matching replacement battery 419791 and replacement charger 419793; matching backpack: Art. 516162; matching cover: 478818 (not included)