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FS1000A

Fleeting

433Mhz transmitter, used with the receiver mx-rm-5v

5V

Transmitter Model: FS1000A Transmitting Frequency: 433.92MHz, 315MHz, 330MHz

https://www.componentsinfo.com/fs1000a-433mhz-rf-transmitter-xy-mk-5v-receiver-module-explanation-pinout/

Notes pointant ici