Safe Material: Drinking water dispenser made of 304 stainless steel and high-density ABS plastic, non-toxic and odor-free. High Compatibility: Electric pumping device suitable for standard pure bottled drinking water and compatible with various gallon-sized water barrels without requiring the lid to be pried open. USB Rechargeable Battery: Built-in 1200mAh rechargeable battery. Provides enough power for dispensing approximately 4 to 6 bottles of 5-gallon water (about 30–40 uses). No need for daily charging. Easy to Use: Simply attach the pump to the bottle opening. One-button operation, convenient and user-friendly for all ages, including elderly users. Note: This water pump is designed for bottles with a 2.16-inch (5.5 cm) neck diameter. Operating Voltage: DC 3.7V Power Rating: 3.8W Charging Time: 3–4 hours Charging Method: USB charging cable included Compatible Bottles: 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: Connect the silicone hose and insert it into the bottle. Secure the water pump in place. Press the button to dispense water. Press again to stop. 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 actual color may vary slightly due to lighting and screen display differences. Measurement error is allowed within +/- 1–3 cm.