Specification Brand RATE Name EP2 2 4G ReceiverFirmware ELRS 3 5 1 Supports 3 0 And Above Antenna Type Board Mounted AntennaAntenna Size 40 90mm OptionalRefresh Rate 25 500Hz D1000Hz Protocol CRSF SBUSTransmission Power 17mW Telemetry Output Type ISM BandDimensions 10x10mmWeight 4 6gFeatures Compact Size for Easy Placement Ultra compact 10 10mm design perfect for tight spaces and streamlined integrations in advanced setups Adjustable Antenna Options Offers two antenna sizes 40mm and 90mm for optimal signal strength and versatility High Refresh Rate Supports 25 500Hz refresh rate ensuring seamless data transmission for precise performance Enhanced Power Efficiency Utilizes 17mW telemetry output optimizing communication while minimizing energy consumption ELRS 3 5 1 Compatibility Fully compatible with ELRS 3 5 1 protocol ensuring stable connections and extended operational ranges Package included 1 x Receiver 2 x Heat Shrink Tube