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. 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: DC5-32V Two input interfaces: Wiring input DC5-32V & USB DC5V Supports to control different voltage ranges USB port power supply more convenient RF Frequency: 433MHz Board consumption: <1W Standby current: 80mA 4 Channel Total Load: 16A/3500W Single Load: 10A/2000W Relay lifespan: ≥1000000 times Electrical insulation resistance: 100M Electric shock voltage: 1000V Relay maximum suction time: 15ms Relay maximum release time: 5ms Working mode: Inching /self-locking Wireless Standard: 2.4GHz, 802.11 b/g/n + BT Mobile App: Tuya on Android/IOS Applicable occasions: smart home. Wifi control Controlled lines: 4 Enclosure Material: Fire-retardant ABS Operating temperature: -20 degrees to +70 degrees Operating Humidity 40% ~ 80% RH Item Size: 79*76*19 (mm) Package Information: Package Size: Approx. 8 * 7.5 * 2cm / 3.1*3*0.8in Package Weight: Approx. 82g / 2.9oz Packing List: 1 * 4CH WIFI + BT Switch Module 1 * 4CH WIFI + BT Switch Module