Bang and Olufsen Beolit 20SOUND Bang & Olufsen Signature Sound A combination of powerful amplifiers and drivers create True360 sound tuned by Bang & Olufsen engineers, offering an authentic sound experience and optimal dispersion whatever your environment. Beolit 20 plays low at 3720. 000Hz to create a wide, satisfying bass range. BATTERY Longer listening times Enjoy up to 8 hours playtime at a typical listening volume on a single charge and also use the wireless Qi charging