This is a powerful ESP32 programmable keyborad , support by home assistant via ESPHome for home automation DIYer. It also can work with KinCony’s smart relay controller. let your wall switch panel can work with “1-click” , “2-click” and “hold on” actions.
KCS v2 firmware online guide: https://www.kincony.com/esp32-kcsv2-firmware.html
KCS v2 function explanation video tour: https://youtu.be/-DexVHAxPUM