Safe Material: BPA-free drinking water dispenser made of 304 stainless steel and high-density ABS plastic, non-toxic and odorless. High Compatibility: Electric pumping device compatible with standard pure bottled drinking water and a variety of gallon-sized barrels without requiring lid removal. USB Rechargeable Battery: Built-in 1200mAh rechargeable battery. Provides usage for 30-40 days or approximately 4-6 bottles of 5-gallon water on a full charge. No need for daily charging. Easy to Use: Simply attach the pump to the bottle opening. One-button operation, convenient and user-friendly for children and elderly users. Note: This drinking water pump is designed for gallon barrels with a 2-inch (5.5cm) neck. Operating Voltage: DC 3.7V Power Rating: 3.8W Charging Time: 3-4 hours Charging Method: USB charging cable included Compatible With: 2, 3, 4, and 5-gallon water bottles Product Dimensions: 2.9 x 5.1 inches / 7.5 x 13 cm Hose Length: 21.7 inches Pipe Length: 4.7 inches Instructions: 1. Connect the silicone hose and insert it into the bottle. 2. Securely fasten the water pump onto the bottle mouth. 3. Press the button to dispense water. 4. Press the button again to stop dispensing. 5. Charge using the included 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 USB Charging Cable Note: The package includes only the items listed above. Other items shown are not included. Note: Lighting and monitor settings may cause slight variations in color between the image and the actual product. Measurement may vary by +/- 1-3 cm.