BRK BRANDS CO410 - CO ALARM DIGITAL DISP BATT OPP - CARBON MONOXIDE DETECTORS BATTERY POWERED - ELECTROCHEMICAL BACKLIT DISPLAY COLOR=WHITE - ELECTROCHEMICAL CARBON MONOXIDE SENSOR, THE MOST ACCURATE SENSOR AVAILABLE. BATTERY POWERED, NO INSTALLATION REQUIRED. BACKLIT ELECTRONIC DISPLAY IDENTIFIES HAZARDS. FRONT ACCESS BATTERY DOOR. BUTTON TO SILENCE OR TEST ALARM FUNCTIONS. 85-DECIBEL ALARM, LOW BATTERY WARNING WITH SILENCE FEATURE. ACTION CHART GIVES INSTRUCTIONS ON WHAT TO DO IF AN ALARM SOUNDS. 3.3" HEIGHT X 4.75" WIDTH X 1.5" DEPTH, 0.39 POUNDS. UL LISTED. 5 YEAR LIMITED WARRANTY. USES 2 AA BATTERIES, INCLUDED. - EQUAL TO 6489124