Alarm clocks are likewise found on mobile phones, watches, and PCs.
Many Alarm clocks have radio receivers that can be set to begin playing at given time, and are known as clock radios. Some Alarm clocks can set multiple alarms. A dynamic Alarm clocks, can have diverse alerts for different times and even play music of you choose.
Many modern mobile phones feature built-in alarm clocks that do not need the phone to be switched on for the alarm to ring off. Some of these mobile phones feature the ability for the user to set the alarm’s ringtone, and in some cases music can be downloaded to the phone and then chosen to play for alarm