Safety and Health: 304 stainless steel outlet, food grade silicone hose, and high-density plastic. Rechargeable: After fully charged, it can use about 4-6 bottles of 5 gallons. It only needs to be charged 1-2 times a month. Please note: Do not use a fast charger, it is recommended to use 5V 2A. If charging is not possible, please try using a new data cable/charger or using a power bank. Easy to install: Only 3 simple steps are needed to install. Connect the 304 water outlet and silicone hose, and then fix them on the water bottle. Super simple. Please do not frequently plug and unplug stainless steel pipes to avoid water leakage. Only one click: press once to pump water. Press again to stop pumping. If the blue light is on but not draining, try resetting it by tapping the side. Fast pumping: With a 4W powerful motor, it can pump 1 liter of water in 1 minute, which is 30% faster than a regular manual pump. 1-minute automatic stop: If the stop button is not pressed, it will stop pumping within 1 minute. No need to wait for water on the side. Universal size: All standard 2.16-inch (5.5cm) bottle necks are suitable, such as 2, 3, 4, and 5 gallon bottles. If loose, please cover the bottle cap. Widely applicable: very small, very portable. It is also easy to carry outdoors, such as camping or picnicking. Important statement: Rechargeable version, does not include battery