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$40, previously known and sometimes still available as the Kidde KN COSM IB, is the hardwired version of the Kidde KN COSM BA but one with a significant difference: It can interconnect with up to 24 Kidde alarms plus an additional six sounding devices. However, it relies on a hardwired connection to do so, so unless you have an existing network of Kidde alarms, it's best for new construction or a major renovation project. Like the KN COSM BA, it has a voice alert to announce whether the hazard is smoke or carbon monoxide, but that and location information is not passed to other alarms in the system. It has been professionally reviewed by Consumer Reports as both a CO detector and a smoke detector, but with only middling ratings. Users are pretty pleased, however, though some complain of false alarms or of receiving the wrong/different unit compared to the model listed and pictured. At Amazon, it earns a 4.home alarm systems reviews
Optionally, the client device also includes a user interface 610 and one or more built in sensors 690 e. g. , accelerometer and gyroscope. The user interface 610 includes one or more output devices 612 that enable presentation of media content, including one or more speakers and/or one or more visual displays. The user interface 610 also includes one or more input devices 614, including user interface components that facilitate user input such as a keyboard, a mouse, a voice command input unit or microphone, a touch screen display, a touch sensitive input pad, a gesture capturing camera, or other input buttons or controls. Furthermore, some the client devices use a microphone and voice recognition or a camera and gesture recognition to supplement or replace the keyboard. In some implementations, the client device includes one or more cameras, scanners, or photo sensor units for capturing images not shown. Optionally, the client device includes a location detection device 616, such as a GPS global positioning satellite or other geo location receiver, for determining the location of the client device. The memory 606 includes high speed random access memory, such as DRAM, SRAM, DDR SRAM, or other random access solid state memory devices; and, optionally, includes non volatile memory, such as one or more magnetic disk storage devices, one or more optical disk storage devices, one or more flash memory devices, or one or more other non volatile solid state storage devices. The memory 606, optionally, includes one or more storage devices remotely located from one or more processing units 602. The memory 606, or alternatively the non volatile memory within the memory 606, includes a non transitory computer readable storage medium.