Rechargable Drinking water dispenser pump

USB Rechargeable Battery: Built in rechargeable 1200mAh battery. Can used for 30-40 days or around 4-6 bottles of 5 gallon water once full charged. No need to charge every day.
Easy to Use: Simply fasten the small pump on the bottle mouth. One switch operation, totally hassle free even for kids and elders.
Note: This drinking water pump is suitable for gallon barrels with a 2.16-inch (5.5cm) neck.
Operating Voltage: DC 3.7V
Power Rating: 3.8W
Charging Time: 3-4 Hours
Charging: Micro-USB Charging Cable