• (3-in-1 Carbon Monoxide Detector) BOSEAN Co., Ltd. is a company that integrates R&D, production and sales. This multi-functional carbon monoxide detector is primarily designed to detect carbon monoxide concentration, temperature, and humidity, and not only prevents carbon monoxide poisoning, but also detects the temperature and humidity of the environment • Equipped with Japanese Figaro High Sensitivity Sensor • Built-in Magnetic Strip & Strap: Depending on your outdoor camping needs, the built-in magnetic strip is included. The strap is included so you can adjust it to a variety of selections, such as adsorption to metal objects or hang it on a tent, or place it directly on a table • Type-C Rechargeable & Ultra Energy Saving Design: In response to the need for power continuity during outdoor use, this product has not only been upgraded to Type-C charging, but also increases the continuity of continuing to operate for at least 100 hours on a full charge, and solves the problem of running out of power in the outdoors • (Concentration numerical display & Rainbow stripe display light & 85 dB loud alarm) The screen display uses a rainbow stick indicator, so you can easily see the status of real-time concentration even under strong outdoor light irradiation, and the sound of 85 decibels can be clearly heard outdoors