Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Descriptions seem to recommend throwing baseball into net with radar behind net.  I'd like to use on a stool behind a catcher - will it work?
Document: This radar speed detector works well for it's intended purpose. You must expect to experiment with it to get the best results.Here's what I mean: If you use this for baseball, you need to position it very close behind and to the side of the catcher and umpire, not off to the side or in the dugout. For soccer, you need to be in-line with the kicker and the net if possible, not off to one side or the other.
So it does not really work if you set it up behind a catcher with a pitcher. You would need to have a pitcher throwing into a net to make this work.Also the angle is fixed. I believe the booklet said there was a 16 or 18 degree up angle. Basically this unit is meant to be set on the ground and positioned near the target you are throwing to over a short distance and then it will pick up the speed.
I got this to use for a fun addition to our baseball practice. Am not sure how accurate it is. You have to be pretty spot on with the ball or else it won't even register. Putting it off to the side like it is pictured did not work at all for us. We had to put it behind a net. Product details state it clocks speeds starting at 15mph but I couldn't get it to register anything less than 25.
In my case, setting up the radar behind the net on a crate about 1ft. off the ground just left of center seemed to work best for slapshots. I found that using a 6oz street hockey ball worked well, but that real 6oz. black rubber hockey pucks did not. Real pucks didn't seem to give reliable readings at all. Once I hit the net dead on in front of the sensor and received no reading.
I had two teenagers test it with both a leather baseball and a football. We positioned it all over the place, including behind the catcher, in front of the catcher, closer to the thrower, a little to the left, a little to the right, and up on a low wall. I tried pushing all the buttons, resetting, turning it off and on, removing and replacing the batteries. It simply did not work. It would not give a reading, no matter what we did.
I suspect it should have been higher.I got much better results throwing a basketball in the back yard and kicking around a cheap soccer ball. Tracing that stuff doesn't seem very useful. This might work OK for a baseball or softball pitch, but I just don't play those sports at my age. I guess you can't expect much for under a hundred dollars. On the plus side, it's easy to set up. The giant LED display is easy enough to read from as much as 20 yards away.
Most negative reviews here complain of inaccurate readings, but I think the device works properly; it's just that it's quite difficult to calibrate, and even then it's only really accurate for measuring the speed of objects coming directly at it.... If you're coming in at an angle, it only gets the vector directed towards it, which is why it's in accuracy is always on the low end. But for setting behind a baseball net and throwing directly at it, it works nicely.
I thought it would work like a radar gun, where you point toward a target and the readout is pointing back at you. This, it turns out, is like a radar gun except that the readout only works pointed towards the target. In other words, a baseball pitcher (the sport I would use it for) would see the readout.
Also, it can't be too big (it doesn't seem to register a car)* The minimum speed is 14 or 15mph, so this won't work well for T-ball or things like that. And it has a max speed of 150, so it wouldn't give me an accurate speed on my baseball pitch (LOL - just kidding).
I've only tested this for youth sports with baseballs, lacrosse and soccer ball in a speed range of about 20-65 MPH, so I can't vouch for other uses or higher speeds. For these uses though, this is a terrific unit.Pros:- Sets up in seconds -- put in batteries, press button- Simple to use, just throw or kick toward the unit (e.g., put it behind a net that you're throwing to), and the speed reads out in big numbers.
Answer: yes