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DIY Object Flow Counter Kit Digital Infrared Ray Counting Module Kit
Description: It has wiring terminal, infrared emitting diode, voltage stabilizing diode and other components. The circuit is stable and count accurately. Outline size: 68 x 61mm LED quantity: 1 3mm red, 1 3mm green Material: double sided 1.6mm FR-4 sheet Package Included: 1 x DIY Object Flow Counter Kit