Powerful CPU: ESP32-S3, 32-bit RISC-V single-core processor running at 160 MHz. WiFi: 802.11b/g protocol, 2.4GhHz, supports Station mode, SoftAP mode, SoftAP+Station mode, and mixed mode. Bluetooth: Bluetooth 5.0 Ultra-low power consumption: deep sleep power consumption of about 43μA;Rich board resources: 400KB , 384KB ROM 4Mflash built-in.Chip Model : ESP32S3FH4R2;Ultra-small size: as small as a thumb (22.52x18mm) Classic form factor for wearables and small projects. Reliable security features: cryptographic hardware accelerator with support for -128/256, hash, , HMAC, digital signature and secure boot;Rich interfaces: 1xI2C, 1xSPI, 2xUART, 11xGPIO(PWM), 4xADC;On-board RGB, Blue LEDs: Public GPIO48 pins; External power supply:If you need external power supply just connect the external power supply + level to the position of B+ on the back of the board, and the negative terminal to B- on the back. (Support 3.3~6V power supply). You can charge the battery by connecting to USB. Enter download mode: Way 1: and hold BOOT to power up. Way 2: and hold the BOOT button of ESP32S3, then the RESET button, release the RESET button, then release the BOOT button, at this time ESP32S3 enter the download mode. External power supply:If you need external power supply just connect the external power supply + level to the position of B+ on the back of the board, and the negative terminal to B- on the back. (Support 3.3~6V power supply). You can charge the battery by connecting to USB. Color: Black Material: Plastic+Metal Package Contents: 1*ESP32-S3 Development 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.