Description: Safe Material: BPA free drinking water dispenser, 304 stainless steel, high density ABS plastic, no toxic, and no smell. High Compatibility: The electric pumping device suitable for pure bottled drinking water, suitable for a variety of models gallon barrel without pry the lid. 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. Specification: Operating Voltage: DC 4.2V Power Rating: 5W Charging Time: 3-4 Hours Charging: Micro-USB Charging Cable Size: 13.8*8.2cm Instructions: Connect the silicone hose and insert the silicone hose to the bottle. Then fasten the water pump Press the button to pump out the water Press the button again to stop pumping Charge with the Micro-USB cable when out of battery colour: Black( Water Dispenser can monitor water quality)/white(Water Dispenser can monitor water quality) Material: ABS+stainless steel