RadioMaster ER3C-i 2.4GHz ELRS PWM Receiver
- Exact Model RadioMaster ER3C-i 2.4GHz ELRS PWM Receiver
- Protocol & Frequency ExpressLRS 3.3.0; 2.4GHz
- Channels & Output 3-channel PWM output
- Telemetry 10mW RF telemetry; external voltage detection 4–35V
- Power & Antenna DC 4.5–8.4V; built-in high-sensitivity ceramic antenna
- Size & Weight 26.1×18.5×13mm; 4.2g
- Product Summary Clean-install three-channel ExpressLRS PWM receiver with integrated ceramic antenna and voltage telemetry.
RadioMaster ER4 2.4GHz ELRS PWM Receiver
- Exact Model RadioMaster ER4 2.4GHz ELRS PWM Receiver
- Protocol & Frequency ExpressLRS 3.3.0; 2.4GHz
- Channels & Output 4-channel PWM output
- Telemetry 10mW RF telemetry; external voltage detection 4–35V
- Power & Antenna DC 4.5–8.4V; 15cm high-sensitivity antenna
- Size & Weight 30×15×5mm; 3.0g
- Product Summary Compact four-channel PWM ExpressLRS receiver with voltage telemetry for lightweight RC installations.
RadioMaster RP4TD-M ExpressLRS 2.4GHz Mini True Diversity Receiver
- Exact Model RadioMaster RP4TD-M ExpressLRS 2.4GHz Mini True Diversity Receiver
- Protocol & Frequency ExpressLRS 2.4GHz; 500Hz / F1000Hz
- RF Architecture ESP32 with dual SX1281 true diversity; Gemini compatible
- Telemetry & Interfaces Up to 2×10mW telemetry; CRSF; Wi-Fi updates
- Power & Antennas DC 5V; two 65mm 2.4GHz T antennas
- Size & Weight 18.1×16mm; 1.0g without antennas / 3.3g with antennas
- Product Summary Ultra-light mini true-diversity ExpressLRS receiver for compact builds that need Gemini reliability.
RadioMaster RP4TD ExpressLRS 2.4GHz True Diversity Receiver
- Exact Model RadioMaster RP4TD ExpressLRS 2.4GHz True Diversity Receiver
- Protocol & Frequency ExpressLRS 2.4GHz; 500Hz / F1000Hz
- RF Architecture ESP32 with dual SX1281 true diversity; Gemini compatible
- Telemetry & Interfaces Up to 2×100mW telemetry; CRSF bus plus UART
- Power & Antennas DC 4.5–12V; two 65mm 2.4GHz T antennas
- Size & Weight 23.7×16.3×4mm; 1.4g without antennas
RadioMaster RP3 V2 ExpressLRS 2.4GHz Diversity Receiver
- Exact Model RadioMaster RP3 V2 ExpressLRS 2.4GHz Diversity Receiver
- RF System ExpressLRS 2.404–2.479GHz antenna diversity
- Core Hardware ESP8285 MCU, SX1281 RF chip, LNA/PA and TCXO
- Performance 500Hz / F1000Hz maximum refresh; up to 100mW telemetry
- Power & Antennas 5V input; CRSF; two 65mm 2.4GHz T-antennas
- Size & Weight 22×13×4mm; 4.6g including two antennas
- Product Summary 2.4GHz antenna-diversity receiver with LNA, 100mW telemetry PA and dual T-antennas.
RadioMaster RP3-H ExpressLRS 2.4GHz Nano Receiver
- Exact Model RadioMaster RP3-H ExpressLRS 2.4GHz Nano Receiver
- RF System ExpressLRS 2.404–2.479GHz antenna diversity
- Core Hardware ESP8285 MCU, SX1281 RF chip, SKY66112 PA and TCXO
- Performance 500Hz / F1000Hz maximum refresh; up to 100mW telemetry
- Power & Telemetry 4.5–8.4V input; Ext-V sensing 4–35V; CRSF/SBUS integration
- Size & Weight 28×24×8mm; 5.1g including two 150mm antennas
- Product Summary Rugged cased diversity receiver for helicopters and CRSF/SBUS flight controllers.
RadioMaster RP2 V2 ExpressLRS 2.4GHz Nano Receiver
- Exact Model RadioMaster RP2 V2 ExpressLRS 2.4GHz Nano Receiver
- RF System ExpressLRS 2.404–2.479GHz; FCC/LBT variants
- Core Hardware ESP8285 MCU, Semtech SX1281 RF chip and TCXO
- Performance 500Hz / F1000Hz maximum refresh; 10mW telemetry
- Power & Interface 5V input; CRSF bus; onboard SMT antenna
- Size & Weight 13×11×7mm; 0.55g
- Product Summary Ultra-light 2.4GHz nano receiver with an onboard SMT antenna, TCXO and Wi-Fi updates.
RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver
- Exact Model RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver
- RF System ExpressLRS 2.404–2.479GHz; FCC/LBT variants
- Core Hardware ESP8285 MCU, Semtech SX1281 RF chip and TCXO
- Performance 500Hz / F1000Hz maximum refresh; 10mW telemetry
- Power & Interface 5V input; CRSF bus; UFL external 65mm T-antenna
- Size & Weight 13×11×3mm; 2.2g including antenna
- Product Summary Nano 2.4GHz receiver with external 65mm T-antenna, TCXO and up to F1000Hz refresh.
RadioMaster XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver
- Exact Model RadioMaster XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver
- Frequency Options 2.4GHz, Sub-G 900MHz or Dual-Band antenna package
- RF Architecture ExpressLRS with Semtech LR1121 and dual-antenna diversity
- Performance Up to 1000Hz refresh and up to 100mW telemetry
- Power & Updates 5V input; built-in Wi-Fi and WebUI configuration
- Size & Weight 20×15mm; approx. 1.3g without antennas
- Product Summary LR1121 antenna-diversity receiver supporting 2.4GHz, Sub-G 900MHz and dual-band antenna configurations.
RadioMaster XR1 Nano Multi-Frequency ExpressLRS Receiver
- Exact Model RadioMaster XR1 Nano Multi-Frequency ExpressLRS Receiver
- Frequency Options 2.4GHz, Sub-G 900MHz or Dual-Band antenna package; FCC/LBT variants where applicable
- Core Hardware ESP32-C3 MCU and Semtech LR1121 transceiver with Wi-Fi WebUI
- Performance 100mW telemetry; DK500Hz / K1000Hz maximum packet rate
- Power & Interfaces 5V input; CRSF plus secondary UART; IPEX-1 antenna connector
- Size & Weight 20×13×3mm; 1.0g without antenna
- Product Summary Ultra-compact LR1121 receiver configurable for 2.4GHz, Sub-G 900MHz or a dual-band antenna package.
RadioMaster XR2 Nano 2.4GHz ExpressLRS Receiver
- Exact Model RadioMaster XR2 Nano 2.4GHz ExpressLRS Receiver
- RF System ExpressLRS 2.4GHz ISM with integrated tower antenna
- Core Hardware ESP32-C3 MCU and third-generation Semtech LR1121 transceiver
- Performance DK500Hz maximum packet rate; 10mW telemetry
- Power & Interfaces 5V input; CRSF and secondary UART; Wi-Fi WebUI
- Size & Weight 16×12×6mm; 0.8g
- Product Summary Tiny 0.8g LR1121 receiver with integrated tower antenna for space-constrained micro builds.
RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver
- Exact Model RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver
- RF Architecture ExpressLRS Gemini / Gemini-X with dual LR1121 RF chains on 2.4GHz and Sub-G 900MHz
- MCU & Updates ESP32D4 with built-in Wi-Fi and WebUI configuration
- Performance Up to 1000Hz refresh rate and up to 100mW telemetry
- Antenna System Dedicated IPEX connectors for 2.4GHz and Sub-G antennas
- Size & Use Approx. 22×18×4mm, 1.7g without antennas; demanding FPV and long-range links
- Product Summary True-diversity Gemini-X receiver for simultaneous 2.4GHz and Sub-G 900MHz operation.
