A "sleep timer" is a feature on electronic devices like TVs, radios, or music players that lets you set a specific amount of time for it to automatically turn off. It helps you fall asleep without worrying about turning off the device yourself.
Sentences with «sleep timer»
You can also set sleep timers and adjust the volume as well. (techradar.com)
There is a new sleep timer so you can set a favorite tune while falling asleep. (windowsphonearea.com)
A useful sleep timer will automatically shut the device off after a specified time, so you will never have to worry about falling asleep with the TV on. (geekwrapped.com)