Features: App Support: For iOS and for Android mobile App eWeLink. Sync Status: Real-time device status provided to App. Remote ON/OFF: Turn 4 electrical devices on/off remotely from anywhere. 3 Working Modes: Switch among interlock/self-locking/inching modes. Independent control: Control each gang separately in APP eWeLink. Supports remotely turn on or off connected appliances, for example light, electric kettle, electric rice cooker, electric curtain, etc. Timing: Supports 8 enabled countdown/single/repeat timing tasks to turn on/off at specified time. Voice Control: Compatible perfectly with for Amazon Alexa, for Google Home, for Google Nest, IFTTT. Share Control: Control your smart home together with your family. Specifications: Power Supply: AC85-250V / USB5V Output: Signal output only, no voltage output. USB port power supply more convenient Board consumption: Less than 1W Standby current: 80mA Max input current: 10A Max Wattage: 2200W Relay lifespan: one million times 100M electrical insulation resistance Electric shock voltage: 1000V Relay maximum pull time: 15ms Relay maximum release time: 5ms Working mode: inching /self-locking Wireless Standard: 2.4GHz, 802.11 b/g/n Mobile App: EWeLink on Android/IOS Application: access control, turn on PC, garage door, etc. Computer application: Remote control computer boot Operating temperature: -40 degrees to +70 degrees Operating Humidity 40% ~ 80% RH NOTE: The smart receiver module has RF function, but without RF remote control. If you need a RF remote control, You can purchase it yourself. Color: green Material: PCB There are differences in printing and silk-screen printing due to different batches, which will not affect the use; there are color differences in the actual product due to different light or display. Package Contents: 1 x 4CH Smart Switch Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.