New upgraded electric balloon pump: 600W full copper motor full copper power cord safer to use. Shock-proof sponge more shockproof & quieter. 22mm heat sink efficient temperature control. Automatic protection device when the pump is unattended for a too long time the pump will automatically disconnect the power supply. Tip: Please be aware that this product will only fill the balloons with air not helium or hydrogen. This machine is only for round balloons do not inflate long balloons. This electric balloon pump is designed with two operation modes one automatic and one semi-automatic. Please choose the right mode for different balloons. If the automatic mode is too fast then please choose semi-automatic(press-on) mode which will avoid blowing balloons burst. When using the semi-automatic mode just simply plug in the pump leave the power switch to the off position and press the nozzle to inflate. If stops pressing inflation will stop as well. Operating steps: Pinch two sides of the mouth of the balloon with your fingers. Cover the inflation port with the balloon. Inflate the balloon by pushing the inflation port down. Release inflation port when balloon size is suitable.