Remote Receiver RC 40 MHZ FM Crystal TX & RX 40MHZ Black 40.665 - 40.995 Channel
FM Crystal 40mhz (1 pair). Checked to work on 40mhz 4 Channel Helicopter Radios. To check this works. Look for "40mhz FM" stickers on the radio and receiver. To suit 40 MHZ Frequency Radio Kits (single conversion).