If you have a pre existing interconnected hard wired smoke detector network, a First Alert SA521CN 3ST sometimes sold as simply the First Alert SA521CN can be substituted for one of the existing units to act as a bridge so that when one smoke detector is activated, all smoke detectors on both networks will sound an alarm. This can be an effective way to integrate new, interconnected photoelectric smoke detectors with an existing hard wired interconnected ionization smoke detector network for protection against all types of fires. The alarms are also compatible with interconnectable First Alert CO and combination smoke and CO alarms, such as the First Alert SCO501CN 3ST Est. $50, which is covered in our section on combination smoke and CO detectors. Both of these smoke alarms use wireless technology to create their interconnected network. If you already have a wired network in place, the First Alert 7010B Est.

installation security system

Today you can buy DIY home security systems that have professional grade wireless security equipment that’s extremely reliable, easy to install and affordable.

• houston security systems
• security company miami
• elderly help button

The device housing encloses at least a plurality of electronic components and includes a front cover plate having an opening.

1. senior medical alert
2. houston home security companies
3. security systems for house