We live in a rural area with 2 labs. They tend to run off in the woods where the cannot hear (or choose to ignore) our calls. The collars fix this problem and they always come home quickly when beeped. Our black lab had this collar for a year or two but he managed to slip it off recently in the woods so we had to buy a new one, but I can say that as old as it was the battery life was still pretty good and would last most of the day. The stimulation is good to have too. We had to use it a few times on the black lab because he can be aggressive to other dogs, but after using the stimulation he now only requires beeping (sometimes not even that, he'll just sit by us and whine when he sees a neighborhood dog). These collars are very durable and easy to use. Don't bother with a cheap knock-off from amazon. Just spend the money now and have something that's good quality and will last. Trust me; been there, done that hah!

When setting up the collars for 2 dogs, I noted that I cannot get the MC stimulation setting.
I can only set to M or C. Also, the stimulation level button is very hit or miss. Sometimes it locks a level in and sometimes it doesn't. So you have to double check whenever you change something.
That said ,just by nature of using an e-collar one SHOULD check and re-check the settings to prevent errors that could potentially harm or scare your dog(s)
On the upside, it has been very effective for correcting unwanted, unruly barking at our kitchen window and for discouraging jumping on people when they enter our home. It took one or two corrections for each behavior and now we are just using the T (tap/vibration) if at all. I have two 60lb. PWD males who are very well behaved except for these two issues. The collars have helped us overcome these unwanted behaviors.

I used an ET-300 to train my puppy, then replaced with this model so I could control both my dogs collars with one remote. Works flawlessly. Walking them both off leash is much less stressful.

I have years of experience using ecollars for training K9's. We purchased the 2 collar mini educator to reinforce nuisance barking and basic house manners for our house dogs. This system allows me to find the best sensitivity for each dog and lock the number in. This helps when more than one person is using the remote to correct a dog. The mini educator collars have been very effective training tools, and within a few days the dogs have a new respect for house rules with a clear, fair, and safe deterrent!

It took me a little bit to understand the directions to program the collars, but other than that they are great. It is nice to be able to correct either dog with just a touch of a button. I have not had any low battery issues, but I do try to plug them in once a week to charge.

Battery lasts for a couple days at a time. Excellent range. Neat vibrating function. Lights on the collars for taking walks or playing in the dark. I like the stopwatch style remote. Easy to operate. I like how the collars cannot accidentally be turned off due to the magnetic on off connector. I like how it has a find me feature which beeps if you ever lose the receiver from the dog. The only negative is that it's difficult to figure out the boosting mode without reading the instructions. But even that's not much of a problem.

It was a bit hard to understand the directions, but now that I have used it, it's fairly easy. The results of using the collar has been positive. My puppy has improved with the collar. He is more behaved, and doesn't jump at our plates during dinner, and has stopped chasing the chickens.

It took me a few days to really understand the manual and how to get it set up, but I usually struggle with technology. I was especially interested in getting it set right for my timid dog. He rarely needs any corrections, but if it is too strong for him, he freaks out for weeks. So I started with 10, out of 100. I am up to 25 and it seems to get exactly the results I am seeking. He listens, responds but is not scared. Perfect! My second dog is quite a bit more bull-headed; her number is 40, and it definitely gets her attention, but she is not afraid either. I love the lack of a warning beep, as that always frightened my timid guy. Now I correct either without alerting the other. Einstein was a bit pricier than I really wanted to go, but now I firmly believe it was worth every penny. You get what you pay for, and I got what I asked for in this setup. By the way, my timid corgi is 25 lbs, and the strong-willed pappy is 20 lbs. These are regular lap dogs that live a very good life. I would not hesitate to use this setup on even the smallest of pets, as it is designed to be extremely gentle.

One of our rescues came to us as a true yapper and quickly turned our other dog into one! We tried everything from positive reinforcement to negative....treats, crate, even the vibration collars. Nothing seemed to effect our Maltese. Barking seemed to be more important to her than anything...until we used our Mini Einstein training collars! After 1 week of training, they don't even wear the collars now. All I have to do is call their name and hold up the transmitter! Amazing! Now we can keep our dogs AND our sanity! Thanks!