Portable Installation: The portable water pump measures 5.5 × 2.7 inches, making it compact and easy to carry. Installation is simple; just place it on top and start using it. It's perfect for use in the kitchen, office, school, or for barbecues, travel, and camping, and is an excellent alternative to bulky, large 5-gallon water dispensers. High Compatibility: This drinking water pump is suitable for bottled purified drinking water and is compatible with most 3-liter to 18.9-liter water bottles. For better support of the pump on the bottle neck, the bottle cap should not be pried open. The water bottle dispenser fits gallon jugs with a neck size of 2.16 inches (5.5 cm). Please confirm your neck size before purchasing. Unique Design: Compared to other ordinary water pumps, our water pump is equipped with a safety lock. Press for 3 seconds to activate the smart lock, and press and hold again for 3 seconds to unlock. It features a simple on/off switch; press the button twice, and it will automatically stop when the water volume reaches 600ml. USB Charging: The water dispenser pump has a built-in 1200mAh high-capacity rechargeable battery, which is quite good for this type of device. A full charge lasts 30-50 days, or approximately 4-6 bottles of 5-gallon water, meaning a small family only needs to charge it once a month. Safe Materials: Food-grade silicone hose, 304 stainless steel faucet, high-density ABS plastic shell, odorless. Built-in silicone seal prevents water leakage.