Tlily - Carbon Monoxide Detectors, with led Digital Display for Travel, 2Pcs

Mini size: even smaller than our palm, carbon monoxide alarm CO alarm detector, with CO digital display and sound alarm, suitable for home, travel. Small in size and powerful in protection, our compact carbon monoxide detector features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels no matter where the detector is placed in the room. To complete protection, be sure to place one on each layer. Your home and every bedroom. Alarm Standard: The alert time depend the level of carbon monoxide concentration. 50ppm, alert within 90 minutes; 100ppm, alert within 40 minutes; 300ppm, alert within 3 minutes.(Note: When you test the detector, please do not use gas blow the hole directly.) Easy to use: 3pcs 1.5V AAA battery powered carbon monoxide detector(Batteries not included), low current consumption, super long standby time. Carbon monoxide detectors are easy to install and require no rewiring. Simple to use with a single test/reset button, a