Features:
Digital Tube: 4-digit common anode with a 0.36-inch digital tube with a score point, highlighted in red
Positioning hole: 4 M2 screw positioning holes, the hole diameter is 2.2mm, which makes the module easy to install and position, and realize the module combination
Digital tube 8-level grayscale adjustable
Control interface level can be 5V or 3.3V
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