Automatic Rock Hard Pump

No squeeing, no pumping, just press the button for automatic suction Compact, quiet, automatic pump controller is designed for one hand operation and superior suction. Clear cylinder with flanged base and measurements. Flexible, non-crimping, detachable hose. High quality tapered sleeve for comfort and secure seal. Automatic release button EZ activation power switch. Silicone sleeve, ABS plastic cylinder and controller, PVC hose. Requires 2 AA batteries, not included.  7.75 inches by 2.25 inches.