Suitable for all the Place Possible to Produce Carbon Monoxide , Such as your Home Kitchen, Bedroom, Bathroom, Hotel. Also Useful When you are Enjoying the Barbecue, Using Charcoal Warm yourself, or Putting it in your Parking Garage, etc. ?New Upgrades?Plug and play. whether you are at home or traveling, it can be hung anywhere with a power supply. ?Why Do You Choose It?CO is a colorless, odorless toxic gas that people cannot feel through their five senses. you need one or more CO detectors to ensure your personal safety. ?Alarm Concentration?When the CO concentration is 50PPMalarm within 60-90 minutes, 100PPMalarm within 10-40 minutes, 150PPM85 decibel sound and light alarm within 5 seconds to remind you The environment is dangerous. ?LCD Display?Monitors and displays the readings in real time, allowing you to quickly understand the environmental conditions. ?Customer service? We are willing to provide you with unconditional returns and exchanges within 90 days. If you have any questions, please contact us by email, we will try our best to help you solve the problem.