RadioMaster RP4TD-M ELRS 2.4GHz Mini True Diversity Receiver

The RadioMaster RP4TD-M is a mini true-diversity ExpressLRS 2.4GHz receiver: two SX1281 radios, each with its own 65mm T antenna, on an 18.1 x 16mm board weighing 1g without antennas. It suits 3-7 inch freestyle, cinewhoops, racing and long-range quads that need the robustness of dual radios without the weight of a full-size receiver.

Key features

• True diversity from two independent SX1281 RF chips for strong interference rejection and class-leading SNR and RSSI

• Built-in TCXO keeps the frequency stable as the board warms up

• Packet rates up to 500Hz, or F1000Hz

• Dual 10mW telemetry output

• ESP32 MCU with Wi-Fi firmware updates, shipped on ExpressLRS 3.4.3

Specifications

• MCU: ESP32

• RF chips: 2x SX1281

• Frequency: 2.4GHz ISM

• Max packet rate: 500Hz / F1000Hz

• Telemetry power: up to 2x 10mW

• Antennas: 2x 65mm 2.4GHz T antenna

• Working voltage: 5V DC

• Output: CRSF serial

• Size: 18.1 x 16.0mm

• Weight: 1.0g without antennas, 3.3g with antennas

• Firmware target: RadioMaster RP4TD-M 2400 RX

Wire it to a free flight-controller UART (RX to TX, TX to RX) from a 5V pad, never a battery or 9V pad. It binds to any 2.4GHz ExpressLRS transmitter or module and will not work with 900MHz ELRS, Crossfire or FrSky systems. In the box: the receiver with both antennas fitted, a CRSF lead, three heat-shrink sleeves and a manual.