The HydroXtreme 5 has the same great features as the HydroXtreme 7 and 9 but is a little smaller, designed for guys whose penis in no longer than 5 and ½ inches or 12.5 cms in length. The main features and benefits of the HydroXtreme5 35% more powerful than the original Hydro7, designed by award winning engineers to be powerful, but remain safe and kind to the bodyWith the addition of the handball pump and hose the power is completely controllable taking the pressure to the maximum safe legal limit. The Smart Latch Valve, making the pump easier to fill in the shower and the New improved comfort pad, makes the unit easier to seal against the body