KIDDE 21032250 HARDWIRED SMOKE & CARBON MONOXIDE ALARM, INTERCONNECTABLE WITH 2 AA BATTERY BACKUP (MODEL 900-CUAR) PHOTOELECTRIC SMOKE SENSOR, ELECTROCHEMICAL CO SENSOR, 120VAC, 60HZ 42MA MAX PER ALARM, AUDIO ALARM 85DB @ 10', WIRING: QUICK CONNECT PLUG WITH PIGTAILS