SMI100-AC Hardwire Interconnect Smoke Alarm with Battery Backup,

Product information Technical Details Brand BRK Style ‎Precision Detection Power Source ‎Battery Powered Color ‎White Product Dimensions ‎5.6"D x 5.6"W x 1"H Item Weight ‎9.6 ounces Alarm ‎Smoke Alarm Sensor Type ‎Ionization Number of Items ‎1 Manufacturer ‎Resideo UPC ‎029054022462 Country of Origin ‎Mexico Item model number ‎SMI100-AC Size ‎1-Pack Pattern ‎SMI100-AC Item Package Quantity ‎1 Included Components ‎Easy Adapter Plug, 9V Alkaline Battery Batteries Included? ‎Yes Batteries Required? ‎Yes Battery Cell Type ‎Alkaline