Shelly 1 Gen4

The Gen4 fits behind my light switch with room to spare, which I wasn't expecting in a box this small. Bluetooth made setup painless before I even joined it to ZigBee.

Tucked this behind my light switch to make the ceiling fixture smart, and the little thing fits in a standard box without any trouble. ZigBee paired instantly and it's been rock solid for weeks, no dropouts or lag.

Paired it with my ZigBee hub and it joined on the first try, no fiddling with the pairing button. The relay is tiny enough to tuck into a shallow wall box behind the switch, and it's been rock solid for a month.