HappyModel EP1 Dual/ EP1 RCXO/ EP2 TCXO True Diversity 2.4GHz ExpressLRS ELRS Nano Long Range RX RC Receiver with RF Amps for ELRS TX FPV RC Airplane Precise details: HappyModel EP1 Dual/ EP1 RCXO/ EP2 TCXO 2.4GHz ExpressLRS ELRS True Diversity Nano Long Range RX RC Receiver with RF Amps for ELRS TX FPV RC Airplane EP1 EP2 ELRS receiver is the hottest Tiny ExpressLRS receiver since it was released. Now the new TCXO version EP series receiver apply "temperature compensated crystal oscillator", accurate frequency and excellent performance in extreme temperature environments make these TCXO much reliable. Description: Brand: HappyModel Model: EP1 Dual, EP1 RCXO, EP2 TCXO (Optional) EP1 TCXO Receiver Type: ISM2.4GHz ESP8285 MCU SX1280(SX1281)IMLTRT RF Module Omni directional antenna Frequency Range: 2400 MHz to 2500 MHz Receive refresh rate: 25HZ~500Hz Working voltage: 5v Weight: 0.41 gram(without antenna) Dimension: 10mm*10mm*6mm Peak gain: 2.23dB Default Firmware out of factory: HappyModel_EP_2400_RX V2.2 version Built-in a TCXO (temperature compensated crystal oscillator) EP2 TCXO Receiver Type: ISM2.4GHz ESP8285 MCU SX1280(SX1281)IMLTRT RF Module SMD Ceramic antenna Frequency Range: 2400 MHz to 2500 MHz Receive refresh rate: 25HZ~500Hz Working voltage: 5v Weight: 0.44 gram Dimension: 10mm*10mm*6mm Peak gain: 3.7dB Default Firmware out of factory: HappyModel_EP_2400_RX V2.2 version Built-in a TCXO (temperature compensated crystal oscillator) EP1 Dual TCXO Receiver Type: ISM2.4GHz ESP32 PICO D4, dual SX1280(SX1281) Antenna connector: IPEX MHF 1/U.FL RF Frequency: 2.4GHz (2400~2480MHz) Telemetry power: >19dbm Receiver protocol: CRSF Input voltage: +5V DC @ "+†pad PCB size: 19mm x 14mm Weight: 1gram exclude antenna Built-in a TCXO (temperature compensated crystal oscillator) Default Firmware out of factory: Unified_ESP32_2400_RX Could upgrade to HappyModel EP1 Dual 2400 RX 3.0FW Package Included: 1xHappyModelEP1 Dual/ EP1 RCXO/ EP2 TCXORX (Optional)