The rechargeable electric water pump is made of high-quality, durable materials, and does not contain BPA. Food grade silicone hose, 304-stainless steel, high density plastic ABS plastic , non-toxic and tasteless, kid friendly. Compatible with all 2,3,4,5-gal. bottle cap diameters between 55-60mm. No installation, no modification, no drilling, no need to stand upright. No need to pry open the lid. It's so simple. Place the water dispenser higher than the water bottle to keep the water flowing from the bottom to the top when pumping. Just fix the hose and faucet, insert and tighten into the bottled water, then press to start dispensing. There are 2-available switches that 1- Simply press the red button for easy manual operation, 2- The weight of the cup will activate the white switch on the base, remove it to stop the dispenser from automatically dispensing water. Built in MSDS-certified 1500mAh lithium-ion battery and attached USB charging cable charging head not included, can be quickly charged in 2-3-hours after about 20-days of use After fully charged, it can be used for 20-days or about 4-5-bottles of 5-gal. of water. No need to charge every day.Avoid overcharging and discharging, shortening battery life. The drinking water pump Easy to install and use, it is suitable for offices, outdoor, public places, hotels, picnics or camping activities and anywhere. you’ll always have fresh water at your disposal both indoors and outdoors if you use electric water dispenser.