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 suitable for standard pure bottled drinking water and compatible with various gallon-sized barrels without requiring lid removal. USB Rechargeable Battery: Built-in 1200mAh rechargeable battery provides operation for 30-40 days or pumps approximately 4-6 bottles of 5-gallon water on a full charge. No daily charging required. Easy to Use: Simple installation by securing the pump onto the bottle mouth. One-button operation, user-friendly for children and elderly individuals. Note: This water pump is designed for water barrels with a 2.16-inch (5.5cm) neck diameter. Operating Voltage: DC 3.7V Power Rating: 3.8W Charging Time: 3-4 hours Charging Method: Micro-USB charging cable 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. Attach the silicone hose and insert it into the water bottle. Secure the water pump in place. 2. Press the button to dispense water. 3. Press the button again to stop dispensing. 4. Charge using the included 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: Lighting conditions and display settings may cause slight variations in color between the product image and actual item. Measurement tolerance is +/- 1-3 cm.