Water Dispenser USB Water Pump 19 Liters For Bottle Mini Automatic Electric Water Gallon Bottle Pump Drink Dispenser|Water Dispensers Features: 1. Designed to care for the elderly and children, easy to install, drink water with one click 2. Two operating modes: 600ML quantitative pumping and coutinuous pumping 3. Designed with safe material, no toxic and no smell, 304 stainless steel water outlet, health and environmental protection 4. Suitable for pure bottled drinking water, a variety of models gallon barrel with 2.16-inch (5.5cm) neck 5. Built in USB rechargeable 1200mAh battery, can be used for 30-40 days or around 4-6 bottles of 5 gallon water once full charged Installation Suggestion: 1. If your bottle is the standard gallon barrel, please don't remove the bottle cap when you install the water dispenser 2. If your bottle is the ordinary barrel, please open a hole on the bottle cap, then install the water dispenser in the hole Thanks very much