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Features: LCD display to show the data of PM2.5/PM10/temperature/humidity clearly. Adopts high accuracy laser sensor and DHT11 temperature & humidity sensor. Built-in 3 levels indicator of air quality: green light indicates excellent, orange light indicates lightly polluted and red light indicates heavily polluted. Includes cool fan for better heat dissipation. With transparent case, components can be well protected. Comes with a USB cable for power supply.Specifications: Material: FR4 + Acrylic Power Supply: USB Interface Working Voltage: 5V Average Working Current: 65MA Laser Type: Class 1, 30MW Finished Product Size: 6.2 * 4.5 * 3cm / 2.44 * 1.77 * 1.18in Product Weight: 77g / 2.72oz Package Size: Approx. 11 * 8.5 * 2cm / 4.33 * 3.35 * 0.79in Package Weight: Approx. 94g / 3.32ozPackage List: 1 * DIY Environment Detector Kit 1 * USB Cable