Universal Security Instruments Kitchen 10 Year Tamper Proof Permanent Power Sealed Battery 2-in-1 Fire Smart Alarm, Model MDSK300S Tamper-proof, smoke-sensing alarm for better protection of the home Universal Smoke Sensing Technology with Patented Rate-of-Rise feature differentiates between cooking and real fires  Protects against fast-flaming and slow smoldering fires Easy to install in every room  No wiring required Maintenance-free sealed battery saves money and eliminates annoying, low-battery chirps Comes with a ten-year limited warranty