Absolutely wireless alarm system, build-in transmitter in console for wireless siren, if intruder enter, sensors detect change and send signal to console, console will call your authorization phone number immediately or text a message to your authorization cell phone * Dual network for double protection of your home or property at the same time but still can work with one network only if you don"t have both either cellular network or landline network.Wireless signal protection so if anyone tries to unlink any sensor from the system, the system will sound the wireless siren and call you immediately. * Landline anti-cut protection so if anyone cuts or unplugs the phone line from its socket while the system is armed, the system will sound the wireless siren and text you a message immediately using the cellular network. * User can self-monitor the system anytime anywhere via your cell phone (listen-in, arm, disarm, intercom). Auto-Dial-out and / or send SMS to alert you of emergency in case of burglary, fire, flood, and SOS similar to other monitoring service providers but you do it yourself and do not need to pay any monthly monitoring fees. * Complete Wireless Solution. Simply plug the main unit to a power outlet and all other sensors are completely wireless (except the outdoor siren which needs a separate power outlet for its loud siren).