RadioMaster is a company that, from the beginning, started to offer ExpressLRS-compatible devices, including transmitters and receivers. Their new RP4TD diversity ELRS RX module comes with a dual-antenna system for improved range and penetration. When paired with TX modules such as the BetaFPV SuperG, you can use the ELRS Gemini mode.
To ensure improved stability, regardless of temperature, the RadioMaster RP4TD is equipped with a Dual TCXO (temperature-compensated crystal oscillator). The module uses an ESP32 processor and two SX1281 radio modules.
The RadioMaster RP4TD measures 23.7*16.3*4.0mm and weighs 1.4 grams. It uses two 65mm 2.4GHz rigid T antennas.
Thanks to the built-in WIFI connectivity, you can wirelessly upgrade firmware to configure the receiver via the built-in WebUI with your PC or mobile phone. By default, it comes with ExpressLRS V3.3.0 (target: RadioMaster RP4TD 2400 RX).
Technical parameters
| MCU | ESP32 |
| RF chip | SX1281 x 2 |
| Frequency Range | 2.4GHz |
| Maximum Refresh Rate | 500Hz / F1000Hz |
| Telemetry RF Power | Max 2x 100mW |
| Firmware | ExpressLRS V3.3.0 pre-installed |
| FW target | RadioMaster RP4TD 2400 RX |
| Working voltage | DC 4.5-12.0V |
| Bus interface | CRSF |
| Antenna | 65mm 2.4GHz T Antenna x 2 |
| Dimensions | 23.7*16.3*4.0mm |
| Weight | 1.4 grams (without antennas) |