Microprocessor: ESP32-C3FN4 (RISC-V architecture 32-bit, main frequency up to 160 MHz) C-type USB interface with full voltage regulator, ESD protection, short circuit protection, RF shielding and other protection measures. On-board SH1.25-2 battery interface with integrated lithium battery management system (charge/discharge management, overcharge protection, battery power detection, automatic USB/battery power switching) Built-in WiFi, Bluetooth dual network connection, in-car Wi-Fi, Bluetooth dedicated 2.4GHz PCB antenna. integrated CH340K USB to serial chip for easy program download, debug information printing; support for development environment. The ESP32-C3 is a development board based on the ESP32-C3FN4 chip. The ESP32-C3FN4 is a 32-bit microprocessor based on the RISC-V architecture. It is a low-power, highly integrated MCU system-on-chip (SOC) with integrated 2.4 GHz Wi-Fi and low-power Bluetooth LE dual-mode wireless communication. The internal 4MB Flash memory is integrated and includes SPI, I2C, UART, , etc. With good RF circuit design and basic low-power design, it is easy for IoT application providers can quickly verify the solution and deploy the application. Main control chip: ESP32-C3FN4 USB to serial chip: CH340K WiFi: 802.11b/g,up to 150bps : Bluetooth LE: Bluetooth 5, Bluetooth mesh : 5*ADC1+1*ADC2;2*UART;1*12C;3*SPI Interface: Type-C;2*1.25 battery interface;2*10*2.54 pins Battery: support 3.7v lithium battery charge and discharge Temperature: -40~85 Size: 40.64x20.32x7.6mm Power consumption: deep sleep 5.5 Colour:black Material:PCB+electronic components Size: 40.64 x 20.32 x 7.6mm Package Contents: 1 x Development board 2 x Pin 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.