Just hit on the flattened balloon and it will inflate automatically. How it's work: Using chemical reaction by breaking up two bags of food grade lemon acid and soda powder. The mixture then create Carbon dioxide gas. Shaking the mixed bag speeds up the reaction and the gas fill up the balloon. Gas of carbon Dioxide is an inert gas. Non explosive, non toxic, no harmful to human being and material is fire retardant. * No Pump needed * Auto Inflation, Time Saving, Effort Saving, Easy to use * Keep the gas in the balloon without leaking in one month * Inflated balloon can stand the weight of 120 Kg * Balloon size: 25 cm x 25 cm * Balloon Shapes: Hanging Star with Bells * OEM Welcome * CE Approved