The Apollo Automatic Power Pump is easy to use with unparalleled suction with fully automatic pressure control with the push of a button. The most high-tech pump on the market today… massive results! The American Pumpers Association. Auto start/stop button, quick air release valve, ergonomic hand-held controller with push button controls. Easy to read LED display measures PSI vacuum inside cylinder. Textured grip, oversized cylinder with universal measurements. Flanged base for a secure seal and body safe donut. Materials: PC (cylinder) ABS with PU Cote (controller) TPR (donut) Silicone (hose). Batteries: 4 AAA. Dimensions: 10 x 2.5 /25.5 cm x 6.25 cm (cylinder).