Supports 2.4 GHz Wi-Fi 802.11 b or g and Bluetooth 5 LE, with onboard antenna Built-in 512 KB 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- inertial measurement unit 3- acceleration, 3- gyroscope, which can detect motion posture, step counting and other functions Onboard PCF85063 chip, connected to battery through AXP2101, to achieve uninterrupted power supply, and reserve a backup battery pad to that function continues to work when 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 Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is 1-3cm.