This is a TP-Link Wi-Fi smart plug. You can control the on/off function of home appliances (excluding heating appliances) connected to the outlet via the app. I purchased it to make my lighting smart, but I didn't use it very often, so I'm selling it. There are few scratches or sunspots, but I have disposed of the outer box, so only the main unit will be sent via Yu-Yu Mercari delivery. Thank you for your consideration.