Can be powered by any 18-20V tool battery through patented pin and boot. Make full use of your tool batteries Hi-efficiency resin-molded 18-20V Brushless DC motor Variable speed control with push button for pump activation 2.8 gallon water reservoir with buckle opening to allow ice and drink storage Brushless DC submersible pump Hi-density Xel50 media with 80% cooling efficiency Not designed for use as an indoor air conditioner .