GOOD KNIGHT Advanced Active+ System

Good knight advanced activ+ system has the powerful Activ+ mode that provides double the power and double the effectiveness. So if there are way too many mosquitoes troubling you, all you have to do is push the switch up to the activ+ mode, the light goes orange and the mosquitoes disappear.
Once the mosquitoes are gone you can push the button down to the normal mode, the light turns green and you can carry on with happy times.