Product Details : Name : Automatic Gas leakage Detector. Model No.-JKD-808 AV voltage-AC 90V-240V 50-60Hz plug-wall plug Working temperature-0℃-50℃ Warm-up Time-About 180S Environment Humility-10%-95% Sound Level-85dB/m Alarm Density-2500PPM(±1500PPM) Alarm time-keep alarming after over 2500PPM Size-70×73×35MM Feature 1. High reliable catalytic combustion method 2. Gas concentration displaying(PPM) 3. Power supply from AC 90V-240V 4. Intelligent microprocessor control 5. Auto low battery warning 6. Alarm memory function 7. Auto detect sensor failure