Brand Meeeno Model MN-EB-MQ2GS Quantity 1 Color Orange + silver Material FR4 Features Based on MQ2 gas sensor can sense smoke and methane in air; Can match w/ Arduino specific sensor expansion board making fire / smoke alarm and methane leaking alarm etc. Specification Sensitivity can be adjusted; Input: 5V-GND; S-pin output air density analog voltage semaphore 0~5V; Working voltage: DC 3.0~5.5V; Pin definition: 1-Signal 2-VCC 3-GND Application Arduino teaching DIY project development SCM learning and experiment English Manual/Spec Yes (E-format) Packing List 1 x Sensor module