Innolink Hardwired connected Smoke and Carbon Monoxide Detector with 2 AA Batteries Back Up, Voice Alert Smoke & CO Alarm, 4-Pack

This Combination Smoke and Carbon Monoxide Alarm , CO function is single-station only, and smoke function is multi-station when interconnected. This Smoke and Carbon Monoxide Detector is powered by120V AC main power with 2 AA battery back-up which can be hardwired interconnect. It also contains a voice message system and SMART SILENT Control to temporarily silence nuisance alarms

• Hardwired Interconnection: Up to 18 Alarm
• Unique voice speaker distinguish between CO warning, fire alarm
• Self-check Function