Supports 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE), with onboard antenna Built-in 512 KB SRAM and 384 KB ROM, stacked 8 MB PSRAM and external 16 MB Flash Onboard 1.8-inch capacitive touch HD AMOLED screen, 368 x 448 resolution, 16.7 M colors, can clearly display color pictures Built-in SH8601 driver chip and FT3168 capacitive touch chip, using QSPI and I2C interface communication respectively, without occupying too many interface pin resources Onboard QMI8658 six-axis inertial measurement unit (3-axis acceleration, 3-axis gyroscope), which can detect motion posture, step counting and other functions Onboard PCF85063 RTC chip, connected to the battery through AXP2101, to achieve uninterrupted power supply, and reserve a backup battery pad to ensure that the RTC function continues to work when the main battery is replaced Onboard PWR and BOOT two customizable side buttons are convenient for custom function development using buttons. 7 GPIO, 1 I2C, 1 UART and 1 USB pads are led out for external devices and debugging, and peripheral functions can be flexibly configured. Onboard Micro-SD card slot provides extended storage, fast data transmission and flexibility, suitable for data recording and media playback, and simplifies circuit design. Color: Black Material: plastic Package Contents: 1x 1.8inch AMOLED Display