Set a timer for 3 hours with the 3-hour countdown timer with an alarm. Online Timer - https://timer.onlinealarmkur.com/en/...more.

Once activated, the timer counts down from 180 minutes (which equals to 3 hours) to zero, making it useful for various applications where strict time monitoring is needed.

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Tritium (from Ancient Greek τρίτος (trítos) 'third') or hydrogen-3 (symbol T or 3H) is a rare and radioactive isotope of hydrogen with a half-life of 12.32 years.

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This amazing 3 hour countdown timer counts down silently until it reaches zero, then it makes a gentle beeping sound to alert you that time is up.

Full HD 1080p Countdown timer with finishing alarmIf you enjoy or find useful then please like, subscribe and if possible consider Donating to www.paypal.me/...

This is a 3-hour flip clock countdown timer with flip sounds.Simple beeps alert at the start, the end, and 10 seconds before time’s up. 🌸🔔 More Saku...

This is a 3-hour flip clock countdown timer with flip sounds every second. An alert bell sounds at the start and the end of the countdown. ⏳💜 Focus deeply with the calm LILAC Flip Clock Style...

Tritium (3H) is widely used in life sciences research. A wide range of tritium-labeled compounds are available, at moderate specific activity, and forms with uniform labeling or selective parts of …