Good Knight Advanced Activ+ system is a very bad mosquito repellent as it does not show any results on even active mode. Even after whole night of active system usage I was still bitten by mosquitoes.
I had bought it after watching the advertisement that you can even use it during heavy mosquito traffic. But after its usage I was very disappointed by the results.
Its smell was unbearable whole night but still it showed no results. It is not user friendly rather it is mosquito friendly as it irritated me but not the mosquitoes. The advertisement is fake and it just changes the LED light on switching to active mode and results are not satisfactory.