For 27 mhz 40 mhz multi frequency automatic identification garage door window remote control|Door Remote Control| - AliExpress
RC modely | Alza.cz
Masters.cz - RC auta - R/C car scale - Kompatibilita RC souprav, přijímač vs vysílač
For 27 mhz 40 mhz multi frequency automatic identification garage door window remote control|Door Remote Control| - AliExpress
Amazon.com: Isali 4CH RC Remote Control 27MHz/40Mhz Circuit PCB Transmitter&Receiver Board Radio System 4.5v-6v for Toy car - (Color: 27Mhz): Home Improvement