Kidde Safety 21007288

Kidde Kidde 21007288 Silhouette Wire-In Low Profile Smoke Alarm With Battery Backup, 85 DB At 10 FT Loud, 120 VAC Operating, 80 MILAMP Operating, 40 - 100 DEG F Operating, Environmental Conditions: Up To 85 PCT Relative Humidity (RH), Ionization Sensor, Dimensions: 5-1/4 IN Width X 1-1/2 IN Depth, Green And Red LED Display, Included: Lithium-ion Battery, Sensitivity: 0.5 - 0.98 PCT/FT, Fits Most Common Electrical 2-Gang Plastic And Round Boxes With 3-1/2 IN Hole Spacing