Features: Highly configurable data packet handler, specified module with ceramic antenna, superb signal. Built to strict quality control standards, design improved for more durability. With data Backup battery, save configuration parameter data EEPROM Down. Support RF wake-up function, low-voltage detection and temperature sensor, frequency hopping, automatic gain control, automatic frequency correction, digital RSSI and other functions. This product has GPS function, GPS module NEO-M8N, 3V-5V power supply universal. Adopting high specification craft, carefully welding, precise hole position, complete functions. Specification: Material: PCB Latest ESP32 version: REV1 Working Voltage: 1.8-3.7V 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 USB CP2104-GMR For SoftRF V4.0 Package List: 1 x Development Board 1 x Antenna 2 x Pin Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.