The FIRST ALERT Slim Photoelectric Smoke Alarm with 10-Year Battery helps protect you and your family from fire danger by reliably detecting smoke from smoldering fires. The slim design makes it easy to install almost anywhere. A built-in 10-year lithium-ion battery provides continuous power without the worry of battery replacement.

• Low-profile smoke alarm reliably detects smoke from smoldering fires
• Slim, easy-to-install design is half as thick as a standard smoke detector
• Built-in 10-year battery offers continuous power
• Photoelectric sensor reliably detects smoke and reduces false alarms
• Patented smoke entry system