Feature: Latest ESP32 version: REV1 Wifi/Bluetooth/4MB Flash/4MB PSRAM/3D Antenna/LORA product description Working voltage: 1.83.7v Acceptable current: 1014mA Emission current: 120mA 20dBm 90 mA 17dBm 29 mA 13dBm Operating frequency: 433 / 470MHz 433HMz version / 868M / 915M 868MHz version Transmit power: 20dBm Receive sensitivity: -139dBm LoRa and 62.5KhzSF 12 and 146bps -136dBm LoRa and 125KhzSF 12293bps -118dBm LoRa125KhzSF 69380bps -123dBmFSK5Khz1.2Kbps Frequency error: /- 15KHz FIFO space: 64Byte Data rate: 1.2K300Kbps FSK 0.018K37.5KbpsLoRa Modulation mode: FSK, GFSK, MSK, GMSK, LoRa TM, OOK Interface form: SPI Sleep current: 0.2uASLEEP 1.5uAIDLE Working temperature: -40 - 85 degC Digital RSSI function Automatic frequency correction Automatic gain control RF wake-up function Low pressure detection and temperature sensor Fast wake-up and frequency hopping Highly configurable packet handler Global Positioning System GPS module NEO-M8N, 3V-5V power supply universal Designated module with ceramic antenna, super signal Save configuration parameter data EEPROM Down Backup battery with data LED signal indicator Default baud rate: 9600 power TP5400 2A battery management LED indicator: There are 4 LEDs to display the battery status in real time. Power button: Click once to start. A quick click 2 will close. USB CP2104-GMR Pre-flash firmware -SoftRF V4.0 Type:Bluetooth , WIFI Compatible Audio Video Equipment Style:Player Model Number:H261 264 267 Weight:60 Dimensions WxHxD:--- Bundle:Bundle 1 Package:Yes Package List: 1 x TTGO T-Beam ESP32 1 x Antenna 2 x Pin