Healthy material: high-density ABS plastic manufacturing, food-grade silicone hose, BPA-free, which is healthily designed for drinking water. The product is completely safe and healthy even for babies. Full Compatibility: The product is suitable for all types of barrel drinking water, compatible with 3 gallon, 4 gallon and 5 gallon bottles of different capacities, as long as the neck of gallon bucket is 2.16 inches (5.5 cm). It can be used withoutprying the lid. Please check the neck size of your bucket before purchasing. USB charging: It has built-in high-capacity battery with 1200mAh for fast charging and long life. When the red light flashes, it needs to be charged. When fully charged, it can be used for 30-40 days or about 4-8 5 gallon bottles of water. The productis delivered with micro USB cable, as long as there is a usb port can be charged. After receiving the product, please replenish the power first. Easy to operate: The product has 2 buttons, press the switch button to keep pumping water, and then press it again to stop pumping water, or automatically stop after pumping continuously to 1.2L;press the 600ml button to pump 600ml of water quantitatively. Low noise: The product has a built-in 3.8W powerful water pump, pumping water quickly; about 2 liters of water can be pumped in 1 minute. The product has a streamline design and noise reduction treatment. The volume is 20~30 decibels when in use, withonly a soft conversation volume.