Screen Size: 1.28 inch round Touch display, 360° rotation + push button + touch, perfect for various smart device applications. Resolution: High-quality 240x240 pixels for clear and vibrant visuals. Rotary Knob: Includes a user-friendly rotary knob for easy navigation and control. Aluminum alloy metal housing, integrated molding. Versatile Use: Ideal for smart watches, portable instruments, and other innovative gadgets. Knob screen firmware flashing instructions: To flash: and hold the "flash button" and connect the USB port to the computer. Once the computer recognizes the knob screen, release the "flash button" to enter flash mode. Specifications: Knob screen size: 1.28 inches Screen resolution: 240x240 Serial port type: TTL Serial port pin count: 4 Power supply voltage: 5V Trigger mode: + touch Secondary development: Supported Color:Black Material:Aluminum Alloy Package Contents: 1 x touchscreen display 1 x firmware burning cable 1 x serial debug cable 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.