Using Countdown Timers

Tap any smartphone on the Timertag label, or scan it with the phone's camera, and follow the link. Select "Countdown Timer", then tap "Select". Twelve preset time periods appear. Tap the one your protocol calls for, then tap "Activate".

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The time remaining is displayed on a blue screen. For the final two hours of every countdown, whatever length you chose, the screen changes to amber so the remaining time is easy to read at a glance. Once the countdown reaches 00h 00m it stops there and takes no further action. The screen continues to display for 30 days from activation.