Product Details ①. DIY Quantity Setting - Press the 600ml button for normal mode to pump 600ml automatically; press and hold for three seconds to enter DIY quantity mode for custom water amounts ②. Insulated High-Density ABS Plastic Shell - Suitable material for electronic drinking water pumps, ensuring durability and insulation ③. Portable Mini Size - Combines complex internal structure with small size, eliminating the need for expensive and space-consuming floor water dispensers ④. Widely Compatible - Universal water pump compatible with 2-5 gallon water bottles featuring a 2.16 inch neck ⑤. Long-lasting Battery - 1200 mAh USB rechargeable battery provides 30-40 days of use, suitable for home, kitchen, office and camping Specification ①. Material: Insulated high-density ABS plastic ②. Compatibility: Compatible with 2-5 gallon water bottles with a 2.16 inch neck ③. Battery: 1200 mAh (USB rechargeable) ④. Battery Life: 30-40 days of use Package List ①. 1 x Water pump Warm Tips ①. To enter DIY quantity mode, press and hold the 600ml button for three seconds ②. Ensure the pump is properly installed on the water bottle neck before use ③. Recharge the battery when water flow becomes weak to maintain optimal performance ④. Store in a dry place when not in use to extend product lifespan