Equipped with a high-performance Xtensa 32-bit LX7 dual-core processor with a clock speed of up to 240MHz Supports 2.4GHz Wi-Fi and Bluetooth 5 (LE), with built-in antenna Built-in 512KB SRAM and 384KB ROM, while also integrating 16MB Flash and 8MB PSRAM Equipped with a 4.2-inch fully reflective screen with a resolution of 300x400, featuring reflective imaging and no backlight required Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Color: As Shown Material: LCD Specification: Battery version Package Contents: 1*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.