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2 X AA Battery Holder with Cover and Barrel Socket with 10 cm cable
you will be able to realize data display via only 2 wires
Based on RC522 chip which is a highly integrated reader/writer IC for contactless communication at 13
Cable length: 15cm
Operating Temperature: ≤80℃
Laser Module 5 V 2mm Traffic Light LED Display Module 2 X AA Battery HolderIntroduction : Device parts Length: 23mm Operating voltage: 4. 5 V 51 Resistance In the ideal case (no dust, no fumes, no barrier), the laser transmission distance is infinite. In general, cloudy night, exposure to 500 meters away from objects, it is clearly visible; For a closer distance, even in the sun of the day, shone on the pavement,outside the building,it is also clearly visible. Application: production of electronic pointer pens, electronic
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