Microprocessor: ESP32-S3FN8 (32-bit LX7 dual core processor, stage pipeline rack Structure, main frequency up to 240MHz).SX1262 LoRa node chip.Type-C USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protectionOnboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching).Integrated WiFi, LoRa, Bluetooth three network connections, onboard Wi-Fi, Bluetooth dedicated 2.4GHz metal spring antenna, reserved IPEX (U.FL) interface for LoRaIntegrated CP2102 USB to serial port chip, convenient for downloading,debugging information printing.With good RF circuit design and low-power.Colour:black+whiteMaterial:PCB+electronic componentsSize:5.8 x 2.2cmPackage Contents:1 x Development board 2 x Pin1 x cable2 x 868-915Hz antennaOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.