Features: The carbon monoxide detector with a digital display offers excellent security, making a loud alarm (85 dB) when it detects a buildup of carbon monoxide, alerts those in danger, ensures the safety of personal life. When excessive carbon monoxide concentration is detected, not only will the alarm sound but also the intelligent voice will remind you to open the window in time, double alarm, to protect your safety. The CO alarm detector adopts a high-precision electrochemical sensor, high stability, and sensitivity, reduces false alarms. Low current consumption, long standby life, powered by 3 AA batteries (not included). The equipment has a low battery prompt and fault self-checking function. High-quality ABS materials, excellent corrosion, heat and impact resistance, good flame retardant effect.