Features:1. Its main hardware architecture is the ESP32, ESP8285 and SX1280 RF chip. The ES24TX module is a complete solution that already pre-loads the expresslr firmware and is ready to use.2. As the official ExpressLRS perfect program has not yet been released, our preinstalled program is beta version, because there are too many kinds of beta programs, so you can download the firmware from our website out of factory.3. There are two kinds of ES24TX factory firmware, one is to match Happymodel PP RX receiver (program version identification code 6cb8152d) and the other is to match Happymodel EP1 and EP2 RX receivers (code program version identification aec8ad82), the factory default firmware is aec8ad82 which corresponds to EP1 and EP2 RX. Description:This Micro TX is designed by Happymodel and based on open source-expresslr which is a very popular low latency, high re-flash rate RF module for remote control airplane and FPV racing. Specifications:Regulatory area: ISM2400MCU: ESP32 (main), ESP8285 (aux, such as backpack)RF DE chip: SX1280IMLTRTJR standard 5pin socketFrequency range: 2400 MHz to 2500 MHzMaximum receive refresh rate: 500HzMinimum receiver refresh rate: 25HzRF output power: 10dbm ~ 24dbm Supplyvoltage: 5v ~ 10vWeight: 9.5 grams (without antenna)Dimension: 55.5mm * 39.5mm * 8mmAntenna gain: 1.87dBi Package Included:EX24TX module * 124TX80 antenna * 13D printed mounting box * 1Antenna adapter cable * 1Notes:1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.