Sort of does the job but I have concerns.
579672
The collar is small enough for a 15 pound dog. I expected the red light to illuminate when the battery was installed but it did not.  The red light does flash when the "beep" or "shock" is discharging.

When the barking dog reaches level 1 the collar beeps and red light flashes once.  When the barking dog reaches level 2 the collar beeps red light flashes once. Level 3 the collar will beep and the red light will flash once.

Level 4 the collar will beep and a very mild shock will discharge and the red light will flash. A very mild shock I barely felt on my fingers.

Level 5 the collar will beep and a stronger shock will discharge the red light will flash once.  This shock was certainly noticeable on my fingers.

Level 6 the collar will beep and the shock will discharge and the red light will flash once.  This shock was strong enough I pulled my fingers away.

Level 7 the collar will beep and the shock will discharge and the red light will flash once. This shock was strong enough to cause me to yelp "OWWWW". The light will flash once then flash continuously for about a minute.  At this point the collar has reset to the level of one beep.

The dial mechanism did seem to adjust the sensitivity of the collar from "-" sign responding to two or three barks and the "+" sign responding to the just the movement of the dog.  I suggest you set the collar dial toward the "-" sign so the collar doesn't discharge a beep or shock just from the dog walking around.  I also suggest you put a piece of tape over the dial as it moves easily and the level can change to higher or lower by the movement of the dog.

All in all I am not thrilled with the collar.  I have concerns about the collar discharging a very unpleasant shock just because the dog is walking around.  I can see a sensitive dog being fried and horrified by the level of shock discharged by this collar just by walking around or maybe shaking its head.  If the dial for sensitivity was able to be set at a certain level and it would stay where set I would have fewer concerns.

If you have a bonehead dog and you set the collar at a medium level, AND put a piece of tape on the sensitivity dial, it would probably work for that type of dog.  Even then, I wouldn't let the dog wear this collar without supervision.  The chance of this collar discharging a severe shock over and over is high.  The collar does reset after a minute but if the collar continues to beep and shock from a low level at a high level over and over it could make any dog lose his mind.

I wouldn't use this collar on a gentle or sensitive dog at all. The risk of accidental shock is just too high.  This collar could send a gentle sensitive dog cringing in the corner just for walking around.  This is where a shock collar moves from being a tool for training to a device of torture.

As it is I will use this collar on a dog that barks like a maniac at meal times. So far with the sensitivity set to "-" and he only wears the collar when I am preparing his food. But he only wears it for about 15 minutes and then it is removed. I wouldn't trust this collar to be worn unless I could supervise the dog at all times.

Update: Even on the lowest "-" sensitivity the dog was shocked while sitting quietly waiting to eat. Time to return the collar to Amazon.

I suggest you consider one of the vibration collars unless you absolutely have to shock the dog and only if you watch the dog while he is wearing the collar.
2506371
Worried that it would be too heavy but it is OK.
2298396
It does what it supposed to I just wish it wasn't so thin.
3226679
As advertised... Kind of pricey, but does the job.
1640566
I had high expectations of this kit.  It is a good idea and priced such that it should not be cheap, however upon opening and handling the tools I do have some concerns.

CASE DOES NOT SEEM TO KEEP THINGS IN RIGHT PLACES:
First of all the plastic sleeve that holds everything in place does not do that well in some cases.  The driver handle falls out every time I go to close the case as does the box cutter.  It is also a bit tricky to put the tape measure away.  Considering the weight and the need for a plastic insert, I wonder why they did not make the case plastic rather than really thin aluminum? The case has a set of suitcase wheels and a handle attached.  My first thought on the handle is that, Im glad Im not going to use this in an airport.  I cant see it lasting too long as it is somewhat flimsy. I had a hard time retracting the handle when I opened it for the first time as it allowed for some misalignment (since it is thin) and I had to wiggle it to telescope the handle back down.  The wheels are also small.  I am concerned that they will catch on things easily.

TOOLS DO NOT HAVE ANY ENGLISH SOCKETS, ONLY METRIC:
The tools seem okay.  But, I had not noticed when I ordered this that only metric (mm) sockets and wrenches were included.  The drive socket refers to the handle that is used only  & '
1/4" Dr. socket: 4, 4.5, 5, 5.5, 6, 7, 8, 9mm
3/8" Dr. socket: 10, 11, 12, 13, 14, 15, 17, 18, 19mm
Combination wrenches:7, 8, 9, 10, 11, 12, 13, 14mm
Maybe some can be substituted for English (inches), but that is never a good application.  I guess I expected a few of each to cover most applications.  As this is not my ONLY set of tools I can supplement from my other sets, but this was disappointing.  Should have read better.  When I saw the spark plug one included, it misled me to think there was some English sizes in the sockets  There is not.

Strangely the allen wrench (hex key) set is all English (inches).
(9) hex key set: 1/16", 5/64", 3/32", 1/8", 5/32", 3/16", 1/4", 5/16", 3/8"

The convenience of this kit will hinge on not only the ability of the case to hold the tools but the selection of the tools.

USAGE:
My usage has been limited to reporting in 30 days, but with vacations and some family issues I have not used this kit extensively.  I will report back once I use it more.  However not being able to close the case because stuff falls out is a major irritant.
2419135
Expensive for what it is but it does the job and I really needed something.
1991917
Seems to work but I think the smell might be giving me a bit of a headache.
4888831
Gets the job done, but I don't really use it much...so I can't really rate it good or bad.
4639773
It seems to do what it's designed to do. I have more issues with the app then I do with the hardware. In that, syncing the Fitbit doesn't always work and I have to plug in and unplug this item to get it to pick up sometimes. I've learned to simply leave it in the laptop now. It's a very tight fit for whatever reason. I feel like eventually I'm going to break it.
3789313
Does the job mostly, but cracks and pops more than I would like.
4075945
Not something I'd want to trust excessively, but it does what it's supposed to do. Be safe when using it!
4624032
Want to use it but it seems flimsy. It makes me worry about breaking it.
2728920
seem rather bulky for what they are and inserting and removing the cables from the cutout puts a lot of stress on the cable.  I'm afraid my cables are gonna get damaged.
3160179
It does the job but I have issues. 1- there is nothing to secure the phone in the pocket except friction. In addition, the top is open allowing inclement weather right to the phone. 2 - the arm band is really small. I have to squeeze it on my arm to catch the Velcro...alright for short runs but I will not try it on the long ones.
1011997
This item does what I need it to, but I am concerned about the durability.  Wish it was metal instead.
1847720
it does the job it is intended to do, but sticks out awkwardly, so my family has hit their leg on it a few times.
2584393
Does the job by keeping the dirt out of te keyboard, but to light and flacid which makes it a bit unstable