<b>Notice:</b><br>1.This switch can be used for small water heater which has live and neutral wire;If your water heater has 2 hot line with 115V for each,can't use;<br>2.The smart switch must work with mesh router or single 2.4GHz broadcast;<br>3.This 40amps relay receiver is 433.92MHz, it can be matched with universal remote transmitter which has the same frequency.So you can add more remotes.<br><br>The smart switch works effortlessly with Amazon Alexa, Google Assistant to give you hands-free voice control over your devices. <br><br><b>Control Your Home Remotely</b> The smart switch uses your existing home Wi-Fi network to provide wireless control of lamps, heaters, fans and more - with no subscription or hub required. <br><br> <b>Product Specifications:</b><br> Voltage: AC85V-250 V,50 / 60 Hz<br>Load: 250 V / 40 A MAX<br> Standby Power Consumption: <0.5 W<br> Working environment: Indoor<br> Working Temperature: -10℃~45 ℃<br> Humidity: ≤80% RH<br> Support: Wifi 2.4 GHz 802.11 b/g/n, 2G / 3G / 4G<br> Wireless Communication Range: 100 m / 328 ft<br> Material: V0 flame-retardant material <br> Dimension: 123 x 61 x 31 mm<br> Net Weight: 135 g<br><br> <b>How to set remote mode:</b><br> 1.Clean code ,clear all remote control data: Press the remote pairing button 8 times to clean code if you want to reset mode.(if you just want to add more remote, no need to clean code).<br> 2.Setting Toggle Mode: Press pairing button 2 times fast,red LED light on,press the remote control button,red LED flash fast, then off, paring done.<br>(Press remote control button, the receiver’s relay is ON,press button again,the receiver’s relay is OFF)<br> 3.How to set the wifi mode<br> Long press the WiFi pairing button 10 seconds,blue LED flash,waiting for app maching.<br><br>Notice:This relay module does not support momentary and Latched mode<br><br><b>Package Includes:</b><br> 1x Wifi remote switch<br>1x Remote control(battery not included,it works with 23A12V battery)