Description

Classification: top layer (blue screen + white button) top layer (blue screen + blue button) top layer (black screen + white button) top layer (black screen + blue button) middle layer (blue screen + white button) middle layer (blue screen + blue button) middle layer (black screen) + white button) middle layer (black screen + blue button) bottom layer (blue screen + white button) bottom layer (blue screen + blue button) bottom layer (black screen + white button) bottom layer (black screen + blue button) separate display panel (blue screen) separate display panel ( black screen)
Category: Top layer (blue screen + white light button) Top layer (blue screen + blue light button) Top layer (black screen + white light button) Top layer (black screen + blue light button) Middle layer (blue screen + white light button) Middle layer (blue screen + blue light button) Middle layer (black screen + white light button) middle layer (black screen + blue light button) bottom layer (blue screen + white light button) bottom layer (blue screen + blue light button) bottom layer (black screen + white light button) bottom layer (black screen + blue light button) separate display board (blue screen) separate display board ( black screen)

The screen has white text on a black background and white text on a blue background, and the buttons have white and blue light
The screen has white characters on a black background and white characters on a blue background, and the buttons glow white and blue.