Relay Adjustable Timer Module - MicroUSB Power mq9 we have plain 433MHz packet

we have plain 433MHz packet radios as well

D datasheet

Plug and play function

1 × Consumer Grade ORP Probe

4-port USB hub board x 1

Relay Adjustable Timer Module - MicroUSB Power mq9 we have plain 433MHz packetSimple Load Switching for Arduino, ESP32, and Automation Builds The Relay Adjustable Timer Micro USB Power Module is a practical relay module from Circuitrocks for students, makers, and repair friendly builds. It fits well in projects that need switching external loads, while keeping setup straightforward for testing and prototype work. Compared with generic parts, this product stands out through details such as USB connection, Compact size, USB. That