About this product: This rechargeable electric water pump is made of high-quality, durable materials and is BPA-free. Food-grade silicone hose, 304 stainless steel, and high-density ABS plastic are non-toxic and odorless, and child-friendly. Compatible with all 2, 3, 4, and 5-gallon bottles with bottle cap diameters between 55-60mm. No installation, modification, drilling, or vertical installation. No need to lift the bottle cap. Very simple to use. (Note: Place the water dispenser higher than the bottle to ensure water flows from the bottom to the top when pumping. Simply attach the hose and faucet, insert and tighten the bottled water, and press to start dispensing. There are 2 switches available: 1- Simply press the red button for easy manual operation; 2- The weight of the cup will activate the white switch on the base, and moving it will prevent the dispenser from dispensing water automatically.