Replace one regular 2-way switch to make the whole system smart. Turn lights on/off from anywhere anytime with Meross app. Works with Apple HomeKit, Amazon Alexa, Google Assistant, and SmartThings. Create on/off schedules or set auto-off timers to work automatically. LED indicator helps find the switch easily even at night. Easy to install and setup. No extra hub required. Neutral wire(blue wire) required. Works with 2.4GHz Wi-Fi only. Apple HomeKit website listed.