Features: 1, Heating voltage: 5 +/- 0.2V (ACDC) 2, Working current: 180mA 3, Circuit voltage: DC5V (Max DC 24V) 4, Load resistance: 10K (adjustable) 5, Test concentration range: 1-100ppm 6, voltage: Less than 1.5V 7, Sensitivity: 3% 8, Response time: Less than 1S (3-5 minute warm-up, preheating time 48 hours) 9, Response time: Less than 30S 10, Component power consumption: Less than 0.9W 11, Working temperature: -10 ~ 50 oC (nominal temperature 20 oC) 12, Humidity: 95% RH (nominal humidity 65% RH) Colour: Black Material: mixture Package Contents: 1 * H2S gas detection module Only the above package content, other products are not included. Note: Light 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.