Multi frequency scanning effect to scatter most kind of mosquitoes away anywhere you want. It's low vibration were there is no harm against human body nor side effect for skin.
How it works:
Only the female mosquito will drink blood as it needs more nutrients from the blood after it is pregnant. After it gets pregnant, it can't have sex as it will affect its life as well as the delivery. Therefore, when it hear the sound of male mosquito, it will try its best to escape. This little unit is to delivery the sound of male mosquito, and all the female mosquito will not come near that unit.
You will be getting 1 spare battery.