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 power for dispensing approximately 4 to 6 full 5-gallon water bottles (30-40 uses). No need for daily charging. Easy to Use: Simply attach the pump securely to the bottle opening. One-button operation, convenient and user-friendly for all ages, including elderly users. 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. Connect the silicone hose and insert it into the water bottle. 2. Securely fasten the water pump onto the bottle neck. 3. Press the button to dispense water. 4. Press the button again to stop the flow. 5. Recharge using the included Micro-USB cable when the battery is low. Color: Black + White Material: ABS Plastic + 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 accessories or products are not included. Note: Slight color variations may occur due to lighting conditions and screen display differences. Measurement error allowed is +/- 1-3 cm.