describe feature: *Safe automatic deflation design: detect at any time, automatically deflate, balance the air pressure in the bottle, prevent sandblasting, bursting, etc., automatically deflate after pumping, no manual operation required, more worry-free. * Simple installation: first install the gas bottle from the bottom position, then add water to the water bottle to the highest water level, then install the water bottle on the machine, and finally press the pump button until you hear the "complete" sound. *Safety: Multiple internal and external safety valves, with automatic pressure relief technology, pressure-resistant and explosion-proof, safer. *Convenient: The water bottle comes with a cap, which is very convenient to use during travel, picnics and other outdoor activities. * Cleaning: Removable case cover and washable base make cleaning more convenient and can be completed in 30 seconds. * Environmentally friendly: no charging, no batteries required, greener and healthier. Specification: Name: Sparkling water machine Material: ABS Water bottle material: PET (BPA free) Package includes: 1*Soda machine (gas bottle not included) 1*water bottle notes: 1. Please allow 1-3 cm (0.4-1.18 inches) differences due to manual measurement and slight color differences to accommodate different display settings. 2. Due to light and screen differences, the color of this item may be slightly different from the picture. beg to be excused.