1PCS 12V normally open trigger delay relay vibration alarm module #YT

1PCS 12V sensor relay module optical control delay adjustable induction 12v #YT

1PCS 5V/12V relay module KY-019 1/2/4/6/8 relay/optocoupler isolation #YT

1PCS One time delay relay 5V12V24V trigger timer control switch motor control#YT

1PCS XH-M131 photoresistor module automatic 12V light control relay #YT

1PCS XH-M131 Photoresistor module Brightness control 12V light control relay #YT

1PCS 1way delay time relay 5V12V24V trigger timer control switch motor module#YT

1PCS Photodiode plus relay module light control switch light detection 5V 12V#YT