First Alert BRK 7020BSL Hardwired Hearing Impaired Smoke Detector with LED Strobe Light , white Description The First Alert hardwired LED strobe light alarm with 10-year sealed battery features an incredibly bright LED strobe that's proven to be extremely efficient in providing assistance for individuals with hearing impairments. The intuitive use of a smart strobe feature carries the ability to distinguish between smoke/heat and Co dangers. First Alert Smart strobe light alarms include a wide compatibility range and can be interconnected with First Alert and BRK smoke, Co, smoke/Co combination and heat models (up to 18 devices, 12 can be smoke alarms). Features: The front cover design of the alarm may vary but product function remains the same Integrated smoke alarm & strobe Light saves time & Money. Requires only one junction box Ac powered with 10-year sealed battery backup Smart strobe - Separate flash patterns to distinguish between smoke and carbon monoxide Powerful 177 candela Synchronized LED Strobe Light provides visual warning for hearing impaired residents Strobe signal Synchronization - When multiple units are installed, strobes flash in unison Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety Product Details: Brand: FIRST ALERT Style: Smoke Alarm With Strobe Light Power Source: Battery Powered,Hardwired Color: white Product Dimensions: 2.3"D x 5.2"W x 5.2"H Alarm: Visual Manufacturer: ‎First Alert Part Number: ‎7020BSL Item Weight: ‎13.1 ounces Product Dimensions: ‎5.2 x 5.2 x 2.3 inches Country of Origin: ‎USA Item model number: ‎7020BSL Batteries: ‎1 Lithium Metal batteries required. (included) Is Discontinued By Manufacturer: ‎No Color: ‎white Style: ‎Smoke Alarm With Strobe Light Pattern: ‎Alarm Power Source: ‎Battery Powered,Hardwired Item Package Quantity: ‎1 Included Components: ‎Alarm, battery Batteries Included?: ‎Yes Batteries Required?: ‎Yes Battery Cell Type: ‎Lithium Metal Date First Available: December 10, 2014