Little blocking part to hinder people from accidentally turning light switches off. If you're using smart bulbs like Zigbee lamps, switching them off by cutting power may have a negative impact on your Zigbee Network, and it's quite annoying, too. This little helper fits into the B+J frame holder and blocks the switch.

Best used if you have small kids that like to play with the light switches or guests that are not used to the smart switches and use mechanical switches instead.