Equipped with a low-power SoC with a RISC-V 32-bit single-core processor, the main frequency is up to 160 MHz. Supports 2.4 GHz Wi-Fi (802.11 b/g) and Bluetooth 5 (LE). Onboard 0.71-inch LCD screen, 160x160 resolution, IPS panel. Built-in battery charging management circuit, reserved VBAT solder joints, can be powered by an external lithium battery. Lead out some GPIO interface pin solder joints, which can be used for external expansion applications. This product is a microcontroller development board that supports 2.4GHz Wi-Fi and Bluetooth BLE 5. The onboard 0.71-inch LCD screen can smoothly run GUI interface programs such as LVGL; combined with a variety of peripheral interfaces, it can quickly develop low-power AI simulation eyes, watches and other HMI applications based on ESP32-C3. Different batches may have different appearance label printing, which not affect the use Colour:Black Material:ABS Package Contents: 2 x ESP32 C3 Round Development Board with Case 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.