I’ll tell you the secret of this device is dangerous !!
I buy this device 2x from aliexpress 6 month a go, yesterday i plug device to wall plug 220V . he device was burnt down after two minutes. Second device also burned. My experiences wih device is bad ..bugs and mosquitoes not scaring , but good burn.
Here is my pictures of burned Riddex:
This device is dangerous for you home and not working , have good price 2.5 usd but it’s scrap.