1. Easy to use, only one AD acquisition pin and pin are needed 2. Analog output, the output voltage is linearly related to the dust concentration within the effective range, built-in attenuation circuit, the output voltage does not exceed 1.5V 3. The sensitivity is 0.5V/(100μg/m³), the effective range is 500μg/m3 · 4. Wide power supply range, built-in boost circuit, working voltage range 2.5V to 5.5V 5. Low power consumption, the current does not exceed 20mA in one sampling cycle<br><br>Fixing hole size: 2.0mm (4 holes) Vent hole size: 9.0mm (The product appearance and printed words depending on the batch, but this does not affect use) Color:Black Material:PCB<br><br>Package Contents: 1 * Dust Sensor 1 * XH2.54 4PIN Connection Cable<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.