SONOFF 4CHR3 & 4CHPROR3 4路Wi-Fi智慧開關（支援RF控制）

Setting up four separate switches in self-locking mode took me about ten minutes, and now I can finally control my kitchen appliances individually without getting up. The RF control is a nice bonus, though I mostly use the app.

Setting up the four switches took me maybe twenty minutes, and the self-locking mode works exactly as advertised for keeping my lights and fan on their own schedules. The interlock function is a nice bonus, too, since I can flip one circuit on while the others cut out automatically.

The interlock mode is a lifesaver for my workshop setup—flipping one switch kills the other three instantly. Took about ten minutes to wire into the existing box, and the RF remote works through walls better than I expected.