Please Note SC07 is a basic standalone unit; it does not support wireless interconnection, does not have WiFi, and cannot be used with a base station; for interconnection, search for SC07W. For WiFi functionality, look for SC07WX or SC07MR 2in1 Protection The combination smoke and CO detector detects both smoke and carbon monoxide faster and more accurately using a photoelectric smoke sensor and an electrochemical CO sensor 10Year Battery The fire and CO alarm is built with a sealed lithium battery that provides 10 years of continuous power, saving you from changing batteries and power outage Combination Alarm with CO Readings When the alarm is triggered, the LCD will display the CO concentration and illuminate. In standby mode, the LCD turns off to ensure you are not disturbed Simple Installation Requires no rewiring; easy to mount this smoke and carbon monoxide alarm on any wall or ceiling with the included mounting bracket, screws, and anchor plugs Informative LCD Displays realtime CO levels from 30999 ppm parts per million taken from the surrounding air, as well as battery level and working status