The portable Aero-152A carbon monoxide detector uses state-of-the-art internal sensors and temp/humidity compensating circuitry to detect dangerous carbon monoxide levels above 50 ppm (FAR 23.831). The pilot is alerted to high levels via a digital display (reads from 40 to 900 ppm), an 85 db audio alarm, and front mounted LED’s. Installs simply by plugging into a cigarette lighter or power adapter. EMI radio interference shielded. Tested to 13,500 ft. For 12/24V. 3 yr mfg warranty.