The timing for the 1 and 2 minute durations is exact, while the 3 minute duration is accurate to within 5 seconds. I am very pleased! I plan to use this for practicing gesture drawing.

The schedule is not accurate. It's disappointing, especially after I've been waiting for over two months.

Packaged very well, thank you. The goods were okay.

I purchased it for my children's tooth-cleaning needs. It's perfect. While it may not be highly precise, it serves its purpose.