Hign-concerned Chemical: None Model Number: FZ2886S Support frequency: 868-915MHz Microprocessor: ESP32-S3FN8 (Xtensa® 32-bit LX7 dual-core processor, five-stage pipeline rack Structure, frequency up to 240 MHz). SX1262 LoRa node chip. Type-C USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection measures. 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 (U.FL) interface for LoRa use. Onboard 0.96-inch 128*64 dot matrix OLED display can be used to display debugging information, battery power, and other information. Integrated CP2102 USB to serial port chip, convenient for program downloading, and debugging information printing. Support the Arduino development environment. We provide ESP32 + LoRaWAN protocol Arduino® library, this is a standard LoRaWAN protocol that can communicate with any LoRa gateway running the LoRaWAN protocol. To make this code run, a unique license is needed. With good RF circuit design and low-power design. Color: As Shown Material: PCB Package Contents: 1*ESP32 LoRa Dev-board 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.