Experience the power of automatic results while potentially unleashing stronger, more powerful, and longer-lasting erections with theMax Boost Pro Flow Penis Pump. This revolutionary power pump has a completely waterproof IPX6 rating, meaning unlike other power pumps on the market, it can be used in the shower, tub, or spa and can even be filled with water without you having to manually pump up the pressure. Simply sit back and relax and let the Pro Flow do all the work. Choose from four constant suction speeds, four automatic suck-and-release pattern settings, or a manual pump mode, all built into the in-line waterproof rechargeable pump.