Feature:1. *Supports WiFi network. Supports numerous WiFi smart switches on one smart phone.2. *Supports status tracking: device status timely provided to the Tuya.3. *Supports remotely turn on or off connected appliances, for example light, electric kettle, electric rice cooker, electric curtain, etc.4. *Supports single/repeat/countdown timing tasks to turn on/off at a specified time.5. *Voice Control: Compatible perfectly with \"Amazon\" Alexa, for Home/Nest, IFTTT.6. *Built-in BT module for fast connection.Specification:Overview:This wireless switch is a low-cost, affordable device with fool type wifi control module, no programming, only need to download an APP and link WIFI then can control the own cloud. As long as the module links WIFI, the connected appliance of different types and brands can be controlled via phone APP Tuya from anywhere anytime in the world. Meanwhile, by setting timing schedules for your appliances and sharing control your smart home together with your family, you can maintain an carefree life. Features:*Supports WiFi network. Supports numerous WiFi smart switches on one smart phone.*Supports status tracking: device status timely provided to the Tuya. *Supports remotely turn on or off connected appliances, for example light, electric kettle, electric rice cooker, electric curtain, etc.*Supports single/repeat/countdown timing tasks to turn on/off at a specified time.*Voice Control: Compatible perfectly with "Amazon" Alexa, for Home/Nest, IFTTT.*Built-in BT module for fast connection.Specifications:Working voltage: DC5-32VTwo input interfaces: Wiring input DC5-32V & USB DC5V Supports to control different voltage rangesUSB port power supply more convenientRF Frequency: 433MHzBoard consumption: <1WStandby current: 80mA4 Channel Total Load: 16A/3500WSingle Load: 10A/2000WRelay lifespan: 1000000 timesElectrical insulation resistance: 100MElectric shock voltage: 1000VRelay maximum suction time: 15msRelay maximum release time: 5msWorking mode: Inching /self-lockingWireless Standard: 2.4GHz, 802.11 b/g/n + BTMobile App: Tuya on Android/IOSApplicable occasions: smart home. Wifi controlControlled lines: 4Enclosure Material: Fire-retardant ABS Operating temperature: -20 degrees to +70 degreesOperating Humidity 40% ~ 80% RHItem Size: 79*76*19 (mm)Package Information:Package Size: Approx. 8 * 7.5 * 2cm / 3.1*3*0.8inPackage Weight: Approx. 82g / 2.9oz Packing List:1 * 4CH WIFI + BT Switch ModulePackage List:1 * 4CH WIFI + BT Switch Module