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 various gallon-sized barrels without requiring lid removal. USB Rechargeable Battery: Built-in 1200mAh rechargeable battery. Operates 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 attaching the pump to the bottle opening. One-button operation, user-friendly for children and elderly individuals. Note: This water pump is designed for gallon barrels with a 2-inch (5 cm) neck diameter. 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 inches Pipe Length: 4.7 inches Instructions: 1. Connect the silicone hose and insert it into the 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 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 accessories are not included. Note: Slight color variations may occur due to lighting conditions and screen display differences. Measurement error tolerance is +/- 1–3 cm.