1. Safety Material This water dispenser is free of BPA and is made of 304 stainless steel and high-density ABS plastic, non-toxic and odorless. 2. High Compatibility The electric pumping device is suitable for pure bottled drinking water and can be adapted to various models of gallon barrels without prying open the bottle cap. 3. USB Rechargeable Battery It is equipped with a built-in 1200mAh rechargeable battery. After being fully charged, it can be used for 30 - 40 days, or approximately pump 4 - 6 bottles of 5-gallon water, eliminating the need for daily charging. 4. Easy to Use Just fix the small water pump on the bottle mouth. One-button operation makes it easy for children and the elderly to use. 5. Precautions This drinking water pump is suitable for gallon barrels with a bottle mouth diameter of 21.6 inches (55 cm). 6. Operating Voltage DC 3.7V 7. Power 3.8W 8. Charging Time 3 - 4 hours 9. Charging Method USB charging cable 10. Applicable Scope 2, 3, 4, 5-gallon water bottles 11. Dimensions 2.9 * 5.1 inches / 7.5 * 13 cm 12. Hose Length 21.7 inches 13. Pipe Length 4.7 inches 14. Instructions for Use 1. Connect the silicone hose and insert it into the bottle. 2. Fix the water pump. 3. Press the button to pump water. 4. Press the button again to stop pumping water. 5. Charge with a USB cable when the battery is depleted. 15. Color Black and white color scheme 16. Material ABS + stainless steel 17. Package Contents 1 water pump 1 water inlet pipe 1 water outlet pipe 1 USB charging cable Only the above package contents are included, and other products are not included. 18. Note Light and different displays may cause slight differences in the color of the items in the picture compared to the actual product. The allowable dimensional error is +/- 1 - 3 cm.