Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Do I have to wear a chest strap?
Document: Tested this one for about a month. I liked the fact that you don't need to wear a strap with it, but as far as readings go, after a week it stopped reading accurately, and then a week later it would frequently freeze up. Got the Beatech BSH800 as a replacement, with chest strap, and I've had no issues (for about the same price, $35)
I check my rate when waking up and in between exercises (to see my recovery rate). Since I get a lot of readings below 50bpm, I am not yet convinced of the accuracy of the tool  I am definitely not an exceptional athlete) but if the alternative is to wear a chest strap, no thanks...Bottom line, it is ok.
Better than the chest strap monitors.- Extra functions: The Omron comes with a calorie monitor which will extrapolate the readings with your age and weight. I find it not too useful because it uses the stopwatch function and only works when the stopwatch is running. This would wear out your batteries fairly quickly and you have to take some readings as often as possible for a better accuracy.
This is a neat little chronograph with a heart rate monitor feature. It was not that difficult to program (just read the instructions). I like the idea of not having to wear a chest strap and being able to check my heart rate throughout the day. It will not match my all time favorite - Timex Ironman 100 lap memory - but a for this price it is a deal. It has a decent look.
when I can place my fingers properly on the monitor the heart rate reads quickly and accurately. If your not working out and your fingers are not sweaty then sometimes you have to moisten your fingers to get the monitor to read. This watch surely beats having to wear a chest strap. I just grab my monitor and go whenever I'm on the way out the door to work out or go for a walk.
I also know, for myself, that if a device is too demanding to set up or use, too uncomfortable to wear... I won't. On these counts the Omron scores high marks. It is easy to set up and use, and comfortable to wear: essentially the size of a large wrist watch. I like that there is not chest strap on this one! (I suspect I would have given up on the one my husband uses very quickly. I do not like wearing straps.
The watch is pretty comfortable to wear. The heart rate is always within a couple of beats of my elliptical chest strap when i compare them. The only thing i wish is that they would come with more than one alarm to per day to program.
Further, there is no storage or average of your heart rate for say the past 12 hours. There's no notice of your max/min heart rate as well. Maybe some people just don't like to wear the chest strap? If so, this watch may be for you.
I like the convenience of not having to wear a chest belt. Seems to be fairly accurate. Display can be a little hard to read but it is comfortable to wear.
My hopes were for a meter without the band that I could use backpacking. While this has no chest transmitter much to my surprise this takes both hands to read: one to wear it and the other to make contact for a spot reading. If you want something better than taking your pulse this will work otherwise, keep looking.
Answer: yes