Apollo Rechargeable Power Pump - the best one handed power pump! per the American Pumpers Association. Totally self contained, wireless design. USB rechargeable training system. High tech, fully automatic pump with easy to use pressure control. Auto start stop button with quick air release valve. Easy to read LED display measures PSI vacuum inside cylinder. Universal measurements on cylinder to track results. Flanged base for secure sealPersonalize your tightness with 3 body safe donuts included: .75 inch, 1 inch, 1.25 inches. USB rechargeable. Charging cord included. Complete charge in 45 minutes; 120 minutes run time. Safe and pure for body and pleasure made using PC cylinder, ABS plastic with polyurethane PU Cote controller, Thermoplastic Rubber TPR sleeves, ABS plastic with silver plating decor. Bulk weight 15.7 ounces. 7.75 inches by 2.25 inches.