The bathmate hercules is the first hydropump (water based pump) a revolutionary device for total penile health. Designed for use in the shower or bath, the bathmate hercules provides men with results within the first few sessions. Vacuum created by water which is far more powerful and uniform. Result from the daily use over a period of time includes larger, harder and longer lasting stamina. Patented hydraulic bellows releases the pressure slowly over time, making it 100% safe to use. Regular use helps you keep you in top health, leading to increased satisfaction: a real boost to your self esteem and confidence.