Upgrade Your Switches: The meross relay module fits into any standard electrical box and can be surface-mounted or flush-mounted, allowing you to easily upgrade your traditional single-pole switch to a smart switch. Compatible with touch switches, push button switches, flush-mounted switches, and other types of switches. Voice Control: The meross relay module can be linked to HomeKit, Alexa, and Google Home for hands-free voice control. Simply say "Hey Siri, turn on the switch in the living room" to activate your switch without lifting a finger. Schedule and Remote Control: Set schedules or apply different scene modes to save energy and control consumption. You can control the switch on other Apple devices, and the meross app is compatible with the Apple Watch. Smart Lighting Solution: Transform your traditional pendant lights into smart lights without replacing your switches or bulbs. Our smart fittings are easy to install, compact, and cost-effective. Neutral Wire Required: Please make sure your original switch has a neutral wire before purchasing. If you are unsure, please consult a professional electrician. Please refer to the wiring diagram on the product detail page. Mini size: 5cm*4.6cm*1.9cm, fits into any standard flush-mounted box. No Hub is required. You can contact the seller with any questions or our after-sales email of the brand.