before using equipment: Your smartphone or tablet is connected to 2.4g WiFi with internet. You need to turn on the phone bluetooth. You have the correct WiFi PWD. Your smartphone or tablet must have access to the /. Your router is openuser guide: You can search for "Tuya Smart" in the mobile to download the app. Register for a Tuya Smart Account. If you have a Tuya Smart account. Just log in.Input voltage:AC 85V-250V/USB 5VMaximum current:2000W/10A/group. Maximum load:3500W/164/40angWireless:Wi-Fi 2,4ghz b/g+Bluetooth. Radio frequency:433Mhz. Working temperature:-20C-70Cadd deviceReset the device first:If light (red light) is blinking , skip the reset step.If not, power on, press and hold the Reset button for 5 seconds. until the light blinks .Click the + sign in the upper right corner of the Tuya Smart APP.Then click on "Automatic Scan", wait a few seconds, when the device is found, click on ""Select a 2.4GHz Wi-Fi network and enter your password.name your deviceWhen is disconnected, the switch will automatically switch to the Bluetooth control of the mobile phoneClick the on/off button on the APP to control the device, and the manual control switch can also be displayed in real time on the APPCode pairing of the remote controlMatching, click settings, RF remote control settings, add.After the prompt interface -up, press and hold the remote control button that needs to be matchedRelease the remote control button, the matching is successfulAdded successfully, assign the remote control button to the switch that needs to be controlledMatch other buttons, repeat stepsDue to different batches, there may be differences in product appearance, color, and text, which will not affect the useColour:WhiteMaterial:plasticSize:81x76x28mmPackage Contents:1 * Module with CaseOnly 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.