Wake me up in 6 hours 42 minutes. Set timer for 6 hours 42 minutes. Set the alarm for 6 hours 42 minutes from now. It is a free and easy-to-use countdown timer.
Set this 6 hours 42 minutes timer and let the countdown start. Use it to control the time limit of any activity and be notified when that limit has been reached. When the countdown stops, an alarm sound will ring.
Start 6 hours 42 minutes timer.