With the TOYJOY Manpower Automatic Power Pump, you can sit back, relax, and enjoy hands-free pumping fun. Its whisper-quiet operation and adjustable intensity modes make for an amazingly effective experience, whether for pure pleasure or endurance training. The ruler engraved on the tube makes it easy to measure your progress. This pump can also be a great aid for erectile dysfunction. Last but not least, it's rechargeable and cordless with a long-lasting battery. Enjoy the next level of pumping power with this automated power pump.