Microprocessor: ESP32-S3FN8 (32-bit LX7 dual core processor, five stage pipeline rack Structure, main frequency up to 240MHz).<br> SX1262 LoRa node chip.<br> Type-C USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection<br> 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).<br> Integrated WiFi, LoRa, Bluetooth three network connections, onboard Wi-Fi, Bluetooth dedicated 2.4GHz metal spring antenna, reserved IPEX (U.FL) interface for LoRa<br> Integrated CP2102 USB to serial port chip, convenient for program downloading,debugging information printing.<br> With good RF circuit design and low-power.<br> Colour:black+white<br> Material:PCB+electronic components<br> Size:5.8 x 2.2cm<br> Package Contents:<br> 1 x Development board<br> 2 x Pin<br> 1 x cable<br> 2 x 868-915Hz antenna<br> Only the above package content, other products are not included.<br> 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.