Shanghai HOTO Technology Co., Ltd.: Powerful Torque: 22 in-lb torque maintains steady rotation even under 55 lb pressure.Efficiency-Max Ratio: With a 22 in-lb torque and 300 RPM, 50% faster cleaning, and 60% less splash.Long-lasting Battery: The built-in 4000mAh lithium battery provides long-lasting power, allowing for 110 minutes of operation to easily clean your whole house.IPX7 Full-body Waterproof: Whether it's in the sink or the bathtub, cleaning is safe and hassle-free.