Nasal aspirator is that it can truly Anti-Backflow and has global patents. When the sensing electrode senses the liquid, it will automatically trigger the flashing reminder of the "faucet" icon in the display, and block the current, completely solving the problem of bacterial infection caused by backflow.There 3 modes of suction can be adjusted, which can resolve almost all kinds of snot. (For stubborn boogers and mucus, soften with saline snot spray first, please wait for about 1 minute, then suck away with this baby electric nasal aspirator )