The dewalt dcr020 compact dab site radio runs on 108v 144v and 18v xr li ion batteries for convenience on the job there is a lsquotech boxrsquo built into the unit that protects portable audio devices from knocks splashes or dust and an integral lsquoroll cagersquo provides protection against impacts drops and knocks for maximum durability there is a 35mm auxiliary audio in port in addition to the usb charging port inside the tech box usb charging ac only this unit comes with