The DeWalt ToughSystem Music Charger is a highly durable, portable and stackable solution to deliver high quality, crisp sound through either radio functionality or wireless Bluetooth connectivity. The built-in charger ensures jobsite productivity by charging power tools. It is water and dust resistant and also can be stacked to other modules. Premium Sound €“ 4 full range tweeters 1 subwoofer 1 assisted bass resonator. Runs on a 12V MAX or 20V MAX DeWalt Li-ion power tool battery or AC outlet. Built-in charger powers 12V MAX and 20V MAX DeWalt power tools. Connectivity with Bluetooth, 3.5mm auxiliary input, 5V/1A USB charger.