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3.6A 5V White Adapter Micro USB Waveshare HDMI 7 inch Display High Sensitivity to Alcohol Vapors: High Sensitivity to Alcohol Vapors: The MQ 3 uses a tin dioxide (SnO2) sensing element that exhibits a significant change in conductivity when exposed to alcohol maintaining at least 80% of original capacity after 500 full charge discharge cycles Whether you are a hobbyist Reliable Warranty 7 day warranty on manufacturing defects coverage on all defects
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