20 control card? (pictured)

Maximum 32* 128 or 16*256 points. (when116 scans), 1/4 and 1/8 scans are supported. Support116, 1/8 and 1/4 scanning modes.

30 control card? (pictured)

Universal bar screen card, which can support 32*5 12/64*256 monochrome screen at most (two colors are halved). Support116, 1/8 and 1/4 scanning modes.

40 control card? (pictured)

Universal bar screen card, which supports single color at most: 64* 1024 or 128*5 12, and double color: 32* 1024 or 64*5 12 or128.

70 control card (pictured)

SD card control card is an upgraded version of U-disk control card, which is more stable than U-disk control card. It is used in the same way as U-disk control card, but it changes the way of storing contents.