Onboard PCF85063 RTC chip, which can easily realize RTC function requirements. Supports 2.4GHz Wi-Fi (802.11b/g/n) and Bluetooth5 (LE), with onboard antenna. Built-in 512KB SRAM and 384KB ROM, stacked 8MB PSRAM and external 16MB Flash. Onboard 3.49-inch capacitive touch HD IPS screen, 172x640 resolution, 16.7M colors, can clearly display color images. Equipped with dual digital microphone arrays, it can implement audio algorithms such as noise reduction and echo cancellation, suitable for accurate voice recognition and near-field/far-field voice wake-up applications. This product is a high-performance, highly integrated microcontroller development board. It features a 3.49-inch capacitive HD IPS display, a highly integrated power management chip, a six-axis sensor (three-axis accelerometer and three-axis gyroscope), an RTC, a low-power audio codec chip, and an echo cancellation circuit, among other peripherals, making it easy to develop and embed into products. LED screen parameters: Display panel:LED Display resolution:172*640 Display brightness:350cd/m2 Display interface:QSPI Touch interface:12C Display size:3.49 inches Display color:16.7M Contrast:1200:1 Driver chip:AXS15231B Touch type:capacitive sensing (The product printed words may vary depending on the batch, but this does not affect use) Type:A/B Color:As Shown Material:PCB+LCD Package Contents: 1 * ESP32-S3 3.49inch 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.