C3FH4 RGB features an ultra-compact design with one risc-v 32-bit single core processor at 160MHz on a PCB, built-in 400 KB and 4 MB Flash , integrated with 2.4 GHz Wi Fi and supporting long-distance Bluetooth 5 (LE), with industry-leading RF performance and low power consumption .By combining -3072-based secure boot and the -128-XTS-based flash encryption, offers a more secure way to answer the Bluetooth security concerns. With low power consumption: It is perfect for any space-constrained or battery-powered devices such as wearables, sensors, and other IoT devices.and fully compatible with Arduin, MicroPython, ESP32-IDF, and other mainstream development platforms to quickly build applications. HIGH INTEGRATION: C3FH4 RGB Including 2 channels of 5V - 3.3V DC / DC, GPIOx11, programmable RGB light x25, button x2, finely tuned RF circuit, providing stable and reliable wireless communication. ESP32-C3FH4 (2.4GHz Wi-Fi and supporting long-distance Bluetooth 5 (LE)) built-in 400 KB and 4 MB Flash USB Type-C(USB OnThe-Go (OTG)) Integrated 5X5 ws2812b-1515(GPIO8) and 2 buttons(GPIO9 and CHIP_EN) 3V power LED and status LED(GPIO10) Size: 21 x 18 mm Colour:black Material:PCB Package Contents: 1 x ESP32 C3 development board 4 x Row needle 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.