The mini WiFi switch is compatible with AC and DC power sources, working voltage: AC90-250V 50/60Hz, or DC12-250V. It should be noted that: AC appliances use AC power supplies, and DC appliances use DC power supplies.Note: It can't be installed in a metal box or placed close to the ground or a large piece of metal,otherwise it may affect the normal recepiton of wireless signals.This small switch is compact in order to fit easily into a built-in box.Thanks to the smartlife app, it will be easy to automate the management of your electrical devices. Everything is done from your Android or iOS smartphone.Its two inputs for a switch allow you to create a two-way very simple! Free to make the connections suitable for your needs. Compatible with Google Home and Amazon Alexa, you can control your devices with your voice. Share the rights to other users so they can act and take control of the module.specifications:Input voltage: 100-240V 50 / 60Hz or DC15-250VMaximum load current: 16AWiFi standard: 2.4GHz 802.11 B / g / nApplication Name: Tuya smart / Smart LifeSize: 41 * 41 * 22mmCertified product:CE /UKCA /FCC /ROHSPackage Included:1*mini smart switch module1*Manual