Modbus Rtu 1/2/4/8 Channel 7-24V Relay Module Switch input output RS485/TTL UART

Preamplifier 3-Way Stereo Audio Source Switching Board Audio Signal Switcher

Modbus Rtu 1/2/4/8 Channel 7-24V Relay Module Switch input output RS485/TTL UART

1/2/4/8 Channel ESP32 WIFI Bluetooth BLE Relay Module ESP8266 Development Board

3 Channel Video Switcher Module 3 Way Video Switcher Unit for FPV Camera Video

ESP32 4-Channel Relay Board WiFi Bluetooth ESPHome Tasmota Smart Switch AC/DC

DC 12V 8 Channel Digital Input Module RS485 Modbus RTU Switch acquisition board

1/2/4/8 Channel ESP32 WIFI Bluetooth BLE Relay Module ESP8266 Development Board