This is a colour TFT LCD Display, 240X240 pixels.
The total size is about 39mm x 28mm, the display is about 26mm x 26mm. Wires pictured are not included, just for demo purposes. Header is provided but not soldered on, you will need to do that. Taking pictures of displays is really hard, in real life it looks crisp clear bright and colourful, any hazyness in the pictures is my rubbish photography.
SPI interface, display supply and signalling is 3.3v – do not use with 5v Arduino directly if your Arduino is 5v you must level shift.
An Arduino library for the ST7789 based on the Adafruit GFX library is downloadable here
Please take care to read the Download and Install instructions fully so you don’t miss the need to install the Adafruit GFX library first.
Have fun!