Perimeter Technology - R21 Invisible Fence Compatible Dog Collar - 7K Frequency

The collar works great. It gives a warning beep instead of just zapping the dog, which we like. It also has the low battery indicator light which is good. Our only complaint is that every now and then it just beeps for no apparent reason. We may be in the house or no where near the fence and it will give off a warning beep which freaks the dog out because he doesn't know what he's doing wrong.

I bought two of these. One works great, loud beeps, consistent correction for the dog. The other is weak and Intermittent. Thankfully, I have one well-trained dog that can use the weak collar, but it’s not ideal.I checked batteries in both, it’s just one collar is weak compared to the other.

When it came in i put the batteries in it and test it on the perimeter, it did not beep so re positioned the battery. It works great our dog only needs to hear the beep and he will stop. I watched him approach the perimeter, as soon as it beeped he stooped. He has been using it everyday with no problems.

So far so good, we just had our Invisible Fence line checked by the company, since it was there when we moved in. We didn't really want to spend the $250 to purchase their collars, so we were happy to find this collar through Amazon. We have two pomeranians and a lab mix. The collar is a bit bulky for our poms, but only .1 oz difference than the MicroLite collar through Invisible Fence - so we just make sure to take them off of the poms when they come back in.Also, we had to trim off a lot of the excess "strap" when we adjusted the collars, but no problems there either. We melted the very end of the nylon to prevent fraying.Great collars and an even better price! Just make sure you're buying the right frequency!*****Update 7 February 2016*****Knocking from 5 to 3 stars. We are now on our third collar, the first one lasted about 2.5 years, the second lasted only 8 months. This is the last time we purchase the cheaper version...if it fails again, we'll pay for the full price one through Invisible Fence. Other than the length of time the collar lasts, still really like it!

The perimeter per collar worked well and has good features, but stopped working after 3 weeks…probably from moisture. The battery was at 85%. This seems to be a recurring issue since the manufacturer has made a reset protocol available, which I have not had time to try yet.

I have had this for 6 months, because my dog was yard trained with invisible fence and it was winter (more unlikely for distraction outside yard). I didn’t realize we were not getting an electrical correction.Once weather was nicer my dog began to leave yard and I realized it was beeping only.Because it’s been passed 30 days of course I could not return.I decided to reach out to perimeter company. I am very happy to say the perimeter people are being very gracious and helpful in trying to fix issue. I am now waiting for a new receiver.Will update.***Perimeter company is awesome. Would suggest to go through them. They will trouble shoot. Collar definitely works with Invisable Fence brand system.

I bought the progressive collar for my Brittany puppy, I will need something stronger when he gets grown. As best as I can tell, it beeps once when he's close, then again. If he stays too close, the 3rd beep nicks him and the 4th beep is a good zap. So, if he runs across the wire and goes far enough, the collar can't tell he is outside the "fence" and will only beep. If he stays close to the wire long enough, it will zap him and he comes running to find me. That sounds all kind gentle, until your bird dog gets on a scent trail and runs into traffic and gets hit (the way I found my first Brit). An adult Brittany will figure that out and be gone as soon as I look the other way.I sure miss my old Innotek 4100 system. It knew when the dog was outside the boundary and would "remind" him until he cane home. I hate that PetSafe bought them and shut them down.

We ordered 2. It was great except one came with the needed Plastic Pet Stop plastic piece and the 2nd one did not. Why are the same pieces not in the same exact packages? We need that piece in order to adequately put together the collar.