FrSky Tandem TDR6 dual-band receiver (2.4GHz & 900MHz)

FrSky Tandem TDR6 Dual-Band 6 Channel Receiver (2.4GHz & 900MHz) Hobby Bolts

FrSky Tandem TDMX dual-band receiver (2.4GHz & 900MHz)

FrSky Tandem TDR10 dual-band receiver (2.4GHz & 900MHz)

FrSky 2.4G 900M Tandem Dual-Band Receiver TD MX Receiver

FrSky TD-MX Tandem Dual-Band Receiver 2.4ghz And 900mhz. Hobby Bolts

FrSky TD R10 Triple Antenna Compatible with 900Mhz and 2.4Ghz 10 Channel

FrSky Tandem TDR18 dual-band receiver (2.4GHz & 900MHz)