Smart Switch with Matter Simple Setup (MSS) - With Matter Simple Setup (MSS), pairing your smart light switches with Alexa is easier than ever. Simply power on the device—your Echo will automatically discover it. Note: MSS is only available when your shopping account matches the Amazon account on your Alexa device. Otherwise, pair it manually via standard Matter setup. WiFi Switch with Energy Monitoring – Monitor real-time energy usage in the Meross app to identify waste, track trends, and estimate electricity costs. This WiFi relay runs on 2.4GHz only, offering stable instant power tracking. Mini Size, Multi-Type Support – With a truly mini size of just 5.0 x 4.6 x 1.9 cm, the Meross relay switch module is perfect for embedded installation behind most standard 1 Way 1 Gang wall switches, including rocker, toggle, in-wall, and reset types. No need to replace your wall plate. This WiFi relay supports up to 10A / 2500W, making it ideal for a wide range of wall light switches. Safe and Easy Installation – Constructed with fire-retardant PC material and pure copper terminals, it ensures reliable, secure, and long-lasting performance. Installation is simple: just ensure your existing switch has a neutral wire (usually blue). No extra hub or complex setup required. Perfect for smart home retrofits and upgrades. Smart Relay with Remote & Voice Control – Remote control your switch anytime via the Meross app, Apple HomeKit, or smart speakers like Alexa, Google Assistant, HomePod, and more. Supports hands-free voice commands like “Hey Siri, turn on the light.” For remote HomeKit access, a HomePod, Apple TV, or iPad is required as a home hub. Schedule, Timer and Offline Control - You can create schedules, timers or countdowns to automatically turn the device on and off according to your routine. Matter devices can still communicate and operate locally even without a WiFi network, and you can continue to control your switches via the Meross app.