Universal Security 10 Year Living Area Smoke + Fire Alarm MP316SB

• 10 year sealed batteries provide continuous protection - even in the event of a power outage
• Eco-Friendly: Reduces environmental waste & eliminates disposal of up to twenty 9 volt batteries
• Lithium-Free Permanent Power from Duracell Duralock Power Preserve Technology
• Tamper proof design provides a higher level of security and prevents battery removal
• Photoelectric Technology is typically more effective at detecting slow smoldering fires
• Drift compensation feature allows alarm to auto adjust sensitivity; Smart aarm technology provides temperature & humidity compensation
• Deactivation key switches alarm off and makes alarm ready for disposal