The BRK® model no. SC7010B is a wire-in, 120 VAC 60 Hz single and multiple station combination smoke and carbon monoxide alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories and other multi-family dwellings as defined in standard NFPA 101. Model SC7010B complies with UL217 and UL2034, CSFM, NFPA 72 and NFPA 720, HUD, FHA and other agencies that model their codes after the above agencies. It meets building codes where AC/DC photoelectric smoke and carbon monoxide alarms are required. The BRK® SC7010B is a state-of the art hardwired with battery backup smoke/CO combo alarm that features a photoelectric smoke sensing chamber, an electrochemical CO sensor and an end of life signal. The spread spectrum horn tone has a lower and varying frequency that makes it easier for the elderly with normal age related hearing loss to hear the horn. This alarm features two latching features and two silence features. Alarm latch easily identifies initiating alarm even after alarm condition has subsided. Low battery latch identifies which unit is in low battery condition by blinking the green power light. Low battery silence temporarily silence the low battery chirp for up to eight hours. Silence alarm for several minutes. Other features include an 85 dB horn, single button test/silence, an easy access battery drawer and dust cover. Optipath 360 technology exclusive patented technology provides 360 deg of direct access to the smoke sensor. 2- locking features are provided to prevent battery theft and/or theft of the unit. Connection to AC power is made with a quick connect wiring harness. Installation is quick, easy and cost effective.