Except for few exceptions, you cannot send iTunes gift to accounts in other countries. More specifically, you can send the gift but the people will not be able to redeem them. They end up stuck with a useless email. What you can do is send iTunes gift cards.
Your alarm system sounds when one of your sensors is triggered or you manually set off the alarm through your control panel or key fob remote. Depending on how your system is set up, one of two things will happen-either a high-decibel alarm will sound or a silent alarm will be sent to your ADT monitoring station.hen your home security system's alarm sounds, it could mean one of many things. You could have an intruder in your home, or you could have a fire, a flood, or a carbon monoxide leak.
On/Off. An on-off controller is the simplest form of temperature. control device. The output from the device is either on or. off, with no middle state. An on-off controller will switch the. output only when the temperature crosses the setpoint. For heating control, the output is on when the temperature. is below the setpoint, and off above setpoint. Since the temperature crosses the setpoint to change the. output state, the process temperature will be cycling.