Smart Switch uses your existing home Wi-Fi network to provide wireless control of your water heater from anywhere, it can easily replace the traditional switches directly, then you can start controlling your water heater from your mobile phone by APP. Features: Wi-Fi Boiler SwitchTouch to control water heater on/ off. Tempered SurfaceWaterproof, moistureproof, scratch-proof. Voice Control & APP ControlCompatible with Amazon Alexa/ Google Home/ IFTTT. You can control your water heater using APP (for iOS/ Android) from anytime or anywhere. Timing FunctionControl water heater based on the schedule timer by APP. More convenient than using traditional alarm clock to remind you of it. Smart ShareShare with family members/ good friends and control together. Wide ApplicationSuitable for water heater, boiler, coffee maker, baking machine and other electric device less than 3000W and 16A. Note:please read user manual carefully before using it. Specifications: Color: Black/ White (Optional) Installation Standard: US Standard/ EU Standard (Optional) Touch: On/ Off APP Remote Control: On/ Off Wiring: Neutral Line and Live Line Material:Tempered Panel + ABS + Fireproof PC Input Voltage: AC 95-250V 50-60Hz Max. Current: 20A/250V Max. Power: 4400W Wi-Fi Protocol: IEEE 802.11 b/g/n 2.4G Security: WPA-PSK / WPA2-PSK APP Support: for Android / iOS APP Download: eWeLink Compatibility: Compatible with Amazon Alexa/ Google Home/ IFTTT Item Size: US Standard: 120 * 72 * 32mm / 4.7 * 2.8 * 1.3in EU Standard: 86 * 86 * 32mm / 3.4 * 3.4 * 1.3in Item Weight: US Standard: 149g / 5.2oz EU Standard: 130g / 4.6oz Package Size: US Standard: 12.5 * 8 * 4.5cm / 4.9 * 3.1 * 1.8in EU Standard: 9.3 * 9.3 * 4.5cm / 3.7 * 3.7 * 1.8in Package Weight: US Standard: 196g / 6.9oz EU Standard: 173g / 6.1oz Package List: 1 * Wi-Fi Boiler Switch 2 * Screw 1 * User Manual (English, German, French, Italian, Spanish)