High Tech Pet MS-4 Microsonic Water Resistant Digital Transmitter Pet Collar

This is a replacement collar, if one dies or something happens. The groomer soaked one, but after drying it worked fine, but the battery was toast. This collar is five years old, missing the test pin, chewed on by the new puppy and is held together with tape, but still works after all this abuse.

EDIT 07/01/2015I was contacted by Marilou Sabina from High Tech, asking me what they could to to earn a 5 star rating. We discussed my grievances from the review below and she assured me they had been addressed in their newest generation of collars. As a show of good faith she offered to send me a collar for each of my pets, as well as a generous supply of replacement batteries.The collars arrived and they have, indeed, addressed my main concerns: The collars are water-resistant and are now secured by a screw. In addition the transducer is a solid, sealed unit instead of being protected by a simple screen. This means it won't be fouled by dirt like the old collars. I'm anxious to see how these perform over the long haul but am very optimistic based on the design changes I've seen.In addition I am extremely happy with the way High Tech pursued my satisfaction with the product.Many thanks, Marilou.---- Original Review ----I love my High-Tech pet door, but these transmitters are RUBBISH: * They come apart WAY too easily. I've purchased five of these for my two cats so far. The first two were lost because they came apart and scattered pieces who-knows-where. I finally got wise and secured them with some electrical tape. And these are cats, not dogs; I can't imagine how poorly they would hold up with an active dog. * The non-weatherproof transmitters are also non-dustproof. Even without getting wet, the transducer became so dirty over time it lost most of its range. At first I was able to clean it with compressed air, but after time the transducer became useless. * This may sound petty (see what I did there?), but the collar that comes with this is laughingly cheap and the clasp is exasperatingly difficult to adjust. You need fingers the size of a three year old to be able to loosen the clasp. It's so difficult to operate you may need to tranquilize your pet just to get this blasted thing off. I mean, really; for 35 bucks you can't include a clasp that's easy for adult-sized fingers to open?If there were any alternatives to this transmitter I would bid High Tech adieu.

Great product. Perfect for little dogs. Very light weight and adjustable to fit large and small dogs. Works great with the High Tech Pet Door. Shipping was quick.

These ultrasonic units work fine.Have had my original one almost 6 months.The dog has it on all the time,even while playing and splashing around the water.The only bad things are the collar materials are cheap -( we just attached the unit to her regular collar with small wire ties.)and you have to get the new batteries online. I recently got another collar for a guest dog and it worked as intended.Recommend you get spare batteries when you install your door.

Great product for our dogs electronic pet door !