Kidde Premium Plus CO Alarm w/ Direct Plug & Battery Backup

Easy installation - that's what these Direct Plug-In Carbon Monoxide Alarms offer. Just plug them into any AC wall outlet for protection against dangerous levels of carbon monoxide. The digital display feature also allows easy viewing of carbon monoxide levels from 30-999PPM (parts per million). These alarms are UL listed. Power Source: 120 VAC (Plug-in) Sensor: Electrochemical Audio Alarm: 85dB at 10 ft. Temperature Range: 40°F to 100°F Humidity Range: 5%-95% relative humidity Size: 6 1/16" L x 3 3/4" W x 1 3/4" H Weight: 1 lb Interconnect: No LED: Blinking Red Dot in Display, Normal Digital Display: Displays CO concentration in PPM Warranty: 5 year limited Provides a warning signal to protect against dangerous levels of carbon monoxide in the home