Portable Pipet-Aid XP is a lightweight, compact Portable Pipet-Aid specifically designed to minimize operator fatigue and provides 2 hours of continuous pipetting without recharging. Each filler has three-speed range selections for both fill and empty operations – fast, medium, and slow. It includes a tissue culture nosepiece, removable stand, holster-type wall bracket, 9VNiMH rechargeable battery, 110V recharger, and four (4) replacement filters.