Microprocessor: ESP32-S3FN8 (32-bit LX7 dual core processor, five 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 protection Onboard 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 LoRa Integrated CP2102 USB to serial port chip, convenient for program downloading,debugging information printing. With good RF circuit design and low-power. Colour:black+white Material:PCB+electronic components Size:5.8 x 2.2cm Package Contents: 1 x Development board 2 x Pin 1 x cable 2 x 868-915Hz antenna Only 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.