Sonoff 433Mhz Smart Wifi Switch Universal Wireless Remote Control Switch Module 2CH DC/AC7-32V Timer Phone APP Remote Control Compatible with "Amazon" Alexa Google Home Voice Control With 4 Keys RF433MHz Remote Controller for Smart Home
Overview:
This wireless switch is a cost-effective device with WI-FI 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 appliances of different types and brands can be controlled via phone APP EWeLink from anywhere anytime in the world.  It integrates with a 433MHz RF receiver module, so the WIFI switch can be controlled by RF Remote indoors. 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 EWeLink. 
*Supports remotely turn on or off connected appliances, for example light, electric kettle, electric rice cooker, electric curtain/door, reversing motor, etc.
*Supports max 8 enabled scheduled/countdown/loop timers for each device.
*Voice Control: Compatible with "Amazon" Alexa/for Google Home/Nest, IFTTT.
*RF Function: Supports controlled by 433MHz RF Remote Controller.
*Share Control: Control your smart home together with your family. 
Specifications:
Working voltage: DC/AC7-32V
​Controlled Device Voltage: AC/DC7-32V/AC85-250V
Supports to control different voltage ranges
Indicator: With a signal indicator, relay pull the light
RF Frequency: 433MHz
Board consumption: