Mobile Carts, Newcastle Systems NB Series, Midrange powered cart, PowerSwap Nucleus Classic lithium system with (2) 460 Wh swappable batteries & charging station, NB300NU2 comes standard with: (1) adjustable shelf, locking casters, wastebasket and holder, integrated docking station, (2) swappable batteries,uilt-in power strip and stand-alone charging station (16" W x 11.6" L x 11.5" H) Optional accessories may be shown in photo and can be purchased separately.