EASY TO INSTALL: The portable water bottle pump measures 5.5 x 2.7 inches, and its compact size makes it easy to carry. Easy to install, you just need to put it on the top to start using it. Perfect for the kitchen, office, school or barbecue, it is a great alternative to a large-capacity 5-gallon water dispenser during travel and camping, etc.HIGH COMPATIBILITY: This drinking water pump is suitable for purified bottled drinking water, and is compatible with most 3L-18.9 liter bottles. In order for the pump to hold the neck better, you should not pry off the cap of the water bottle. The water bottle dispenser is suitable for gallons with a 2.16-inch (5.5 cm) diameter neck. Please confirm the neck size before purchasing.Unique Design: Compared with other ordinary water pumps, our water pump is equipped with a safety lock. After pressing for 3 seconds and activating the smart lock, long press for 3 seconds again to unlock. One switch operation, press the button 2 times, and it will automatically stop calling when the water volume reaches 600 ml.USB Rechargeable: The water bottle pump comes with a 1200 mAh large-capacity rechargeable battery, which is very important for such a device. After fully charged, it can be used for 30-50 days or about 4-6 bottles of 5-gallon water. For a small family, it only needs to be charged once a month.Safe materials: food-grade silicone hose, 304 stainless steel faucet, odorless high-density ABS plastic shell. Built-in silicone seal prevents water leakage