For TTGO T Beam ESP32 433MHz GPS WiFi Wireless Bluetooth Module With LED Signal Indicator Light Features: With data Backup battery, save configuration parameter data for EEPROM Down. Highly configurable data packet handler, specified module with ceramic antenna, superb signal. 2A battery management, there are 4 LED to display battery status in real time. This product has GPS, GPS module NEO-M8N, 3V-5V power supply universal. Click the power button once to start, and the Bluetooth module will be turn off with quick twice click. Specification: Material: PCB Latest ESP32 version: REV1 Wifi\Bluetooth\4MB Flash\4MB PSRAM\3D Antenna\LORA Acceptable Current: 10-14mA Emission current: 120mA + 20dBm 90 mA + 17dBm 29 mA + 13dBm Working Frequency: 433MHz Transmit Power: +20dBm Receive Sensitivity: -139dBm LoRa and 62.5Khz&SF = 12&146bps -136dBm LoRa and 125Khz&SF = 12&293bps -118dBm LoRa&125Khz&SF = 6&9380bps -123dBm FSK&5Khz&1.2Kbps Frequency Error: ±15KHz FIFO Space: 64Byte Data Rate: 1.2K-300Kbps/FSK 0.018K-37.5Kbps/LoRa Modulation Mode: FSK, GFSK, MSK, GMSK, LoRa TM, OOK Interface Form: SPI Sleep Current: 0.2uA/SLEEP 1.5uA/IDLE Working Temperature: -40℃-+85℃ Battery Model: 1x18650(not include) Default Baud Rate: 9600 Package List: 1 x Bluetooth Module 1 x Antenna 1 x Connect Cable 3 x Gasket 2 x Pin