$269.00
Base kit includes one ADT base and one door/window sensor.$24.99 and up
$39.99 with cameras and $29.99 with other smart home devices. Monitoring costs are $10 more per month with professional installation. A monitoring plan is required with equipment purchase (1 month minimum for DIY and a several-year contract with professional installation), but you can arm and disarm a DIY system for free after the first month.Add-on CO detector, smoke detector and water/temperature sensor.