Specification: ESP32 Lastest ESP32 Version: REV1 WIFI bluetooth 4MB Flash 4MB PSRAM 3D Antenna LORA Product Description Working voltage: 1.83.7v Acceptable current:1014mA Transmit current: 120mA20dBm 90mA17dBm 29mA13dBm Operating frequency: 433/470MHz433HMz version /868M/915M868MHz version Transmit power: 20dBm Receive sensitivity :-139dBmLoRa 62.5KhzSF12146bps -136dBmLoRa 125KhzSF12293bps -118dBmLoRa 125KhzSF69380bps -123dBmFSK5Khz1.2Kbps Frequency error: /-15KHz FIFO space: 64Byte Data rate: 1.2K-300KbpsFSK 0.018K-37.5KbpsLoRa Modulation Mode: FSK,GFSK,MSK,GMSK,LoRa TM,OOK Interface form: SPI Sleep current: 0.2uASLEEP 1.5uAIDLE Operating temperature: -40 - 85 degC Digital RSSI function Automatic frequency correction Automatic gain control RF wake-up function Low voltage detection and temperature sensor Fast wake-up and frequency hopping Highly configurable data packet handler GPS GPS modules NEO-M8N, 3V-5V power supply Universal Destined module with ceramic antenna, signal super Save the configuration parameter data EEPROM Down With data backup battery There are LED signal indicator Default Baud Rate: 9600 Power TP5400 2A Battery Management LED indicator: There are 4 LEDs show the battery status in real time. Power button: Click one time will start. Fast click 2 times will shut down. USB CP2104-GMR Pre-Flash Firmware Type:Bluetooth , WIFI Compatible Audio Video Equipment Style:Player Model Number:--- Weight:--- Dimensions WxHxD:---- Bundle:Bundle 1 Package:Yes Package List: 1 x TTGO T-Beam ESP32 1 x Antenna 2 x Pin