Safe Material: Drinking water dispenser made of 304 stainless steel and high-density ABS plastic, no harmful substances, and no odor. High Compatibility: Electric pumping device suitable for pure bottled drinking water, compatible with various 2, 3, 4, and 5-gallon water bottles without prying the lid. USB Rechargeable Battery: Built-in rechargeable 1200mAh battery. Can be used for 30-40 days or approximately 4-6 bottles of 5-gallon water on a full charge. No need to charge daily. Easy to Use: Simply attach the pump to the bottle mouth. One-button operation, easy and convenient for children and elderly users. Note: This drinking water pump is designed for water bottles with a 2.16-inch (5.5cm) neck diameter. Operating Voltage: DC 3.7V Power Rating: 3.8W Charging Time: 3-4 hours Charging: Micro-USB charging cable Suitable for: 2, 3, 4, 5-gallon water bottles Size: 2.9 x 5.1 inches / 7.5 x 13 cm Hose Length: 21.7 inches Pipe Length: 4.7 inches Instructions: Connect the silicone hose and insert it into the bottle. Then secure the water pump. Press the button to dispense water. Press the button again to stop dispensing. Charge using the Micro-USB cable when the battery is low. Color: Black + White Material: ABS + Stainless Steel Package Contents: 1 x Water Pump 1 x Inlet Pipe 1 x Outlet Pipe 1 x Micro-USB Charging Cable Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3 cm.