Hessaire Crdls 18-20V Batt Powerd 900CFM Port Evap Coolr (Batt not incl) DC Vari.Spd Hi Vel Cool Fan 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 DC18