MOSTRUST Digital Dual Kitchen TimerWhen set to the highest alarm loudness (90 dba at the back of the timer, 88 dba at 12” in), it is loud enough to be heard two rooms away even with a TV on).This is a very nice triple timer design with ½” high digits on an LCD display and uses a 1" diameter ceramic disk resonator that is driven at 2 KHz which puts it right in the middle of the human audio spectrum where it is easily detected. The resonator is driven with two AAA batteries which are required to deliver the 90 dba output level at the back of the case (88 dba at 12” omnidirectionally) making it very effective even in a noisy kitchen and sufficient to get your attention 30 ft and three rooms away through a couple of doors and with the TV on. So it gets high marks on effectiveness.When a timer reaches zero and the audio alarm sounds, a red LED flashes illuminating the timer select button for the Alarm that is beeping. While I didn’t initially think I would use this feature, it quickly became apparent that when I have two (or more) of the same timers in the kitchen and one of them goes off, it is not immediately clear which Timer is sounding (since they are all loud). You can tell whether it is Alarm 1, 2, or 3, by the unique beep sequence (two beebs for Alarm 1, three for Alarm 2 and four for Alarm 3) but not which Timer is making the noise. The flashing red LED allows you to see from 20 ft away which one it is.The ability to store a preferred time for each alarm while still setting the timer for arbitrary times, recalling the preferred setting when you want it, is a highly useful feature. Since I cook hard boiled eggs for 14:33 but use the Timer for many other things between uses for cooking eggs, it is nice to not have need to reprogram the 14:33 each time I need to use it. I just leave Alarm 2 memory set to 14:33 then when I need to I select Alarm 2 and then press the M-button and it is set to 14:33. Not a big deal, but a clever and useful design detail.I was looking for a timer to replace two 40 yr old West Bend Model 53095 triple timers which have finally been dropped enough times that they are no longer reliable.I first tried the new West Bend model that is labeled as 50053 and discovered that it beeps at 4KHz which is outside what is considered the normal human speech spectrum, is powered by a single AAA battery, which makes it too quiet to be heard more than a few feet away (60 dba @ 3”).[note that the difference between 60 dba and 90 dba is a factor of 1000 in acoustic power which is a BIG DEAL in terms of how far away you can hear it]I then tried an OXO Good Grips Triple Kitchen Timer and found it to be unusable as the display is off except for one minute after you set it and then again when the timer goes off and the design results in very short battery life and thus excessively high operating cost.So I am happy to find an excellent and affordable replacement for a 40 year old triple timer with equal acoustic performance and a couple of additional useful features (the Memory capability, and the flashing red LED showing which Timer and which Alarm is going off). I highly recommend this one and will probably buy one more for high usage and as a spare for the time in the far distant future when there is a hard failure.Potential improvements: This timer does not provide any user feedback when a key is pressed, not a key click nor a beep. While tolerable, it is an unnecessary annoyance that could be fixed with a few lines of software (call the beep function at the beginning of the key handler) which would be a significant improvement without impacting battery life to any noticeable extent.