SPEKTRUM THE ORIGINAL 2.4 Ghz Dsm Sr301 Sport 3 Channel Receiver With Bind Plug $19.99 - PicClick
Am312 Hc-sr501 Hc-sr505 Mh-sr602 Adjust Ir Pyroelectric Infrared Mini Pir Human Sr301 Sensor Detector Module Bracket For Arduino - Smart Human Body Sensors - AliExpress