Product Details Ⅰ. DIY Quantity Setting - Press 600ml button for automatic 600ml water pumping; press and hold the 600ml button for three seconds to enter DIY quantity mode, meeting personalized water volume needs Ⅱ. Insulated High-Density ABS Plastic Shell - The bottle dispenser body uses insulated high-density ABS plastic shell, suitable for electronic drinking water pumps, ensuring durability Ⅲ. Small and Portable - Combines complex internal structure with portable mini size, eliminating the need for expensive and space-consuming floor water dispensers at home Ⅳ. Widely Compatible - Compatible with 2-5 gallon water bottles with a universal 2.16 inch neck, suitable for various water bottle specifications Ⅴ. Long Battery Life - 1200 mAh USB rechargeable battery ensures 30-40 days of use, reducing frequent charging麻烦 Specification Parameters Ⅰ. Material: Insulated high-density ABS plastic Ⅱ. Compatibility: Compatible with 2-5 gallon water bottles with a universal 2.16 inch neck Ⅲ. Battery: 1200 mAh (USB rechargeable) Package List Ⅰ. 1 x Water bottle pump Warm Tips Ⅰ. Before use, ensure the water bottle neck size matches 2.16 inch Ⅱ. When entering DIY quantity mode, press and hold the 600ml button for exactly three seconds Ⅲ. Charge the battery in time when the power is low to avoid affecting normal use Ⅳ. Keep the product away from high temperature and humid environments when storing