i have had Innoteks which i did not like. i sent them back. now i use D.T.s 200 models and Sportdog's 2400 Pro Hunter model. i have had some trouble withthe DT unit but the company always made the repairs pretty fast. ussually within 10 days. the Sportdog Pro 2400 has by far been the best training collar i have ever used. it is over a year old i have never had any trouble at all. we don't just use ours on weekends or a few months a year we use them just about ever day. if we are not training we are using them just to walk the dogs. the dog-tra you are talking about is a spin-off of the d.t. collars from whenthe company split up a few years back. the d.t. 200 has a range about a 900 yards which it will do in open country but in a wooded area this drops down to400 yards. i have never maxed out the sportsdog 2400yet. they say it has a range of 1-1/2 miles. which maybe possible in the open fields.i have seen it work in a semi wooded area out to 700 yards with no trouble.also tried the sportsdog 1200 but was not to happy with it. it range was pretty limited about 400 yards in the semi wooded areas and good for about 500 yards in open country. all that i have tested were done with a cell phones between my wife and myself so i know the distances were pretty true. one more thing. never buy a training collar that does not have a warning mode on it. such as a beeper or vibrator. you always give a warning before you go to the shock mode. it will not belong before the only mode you will need is the warning to turn the dog. the vibrator mode works good on older hard of hearing dogs and the beeper seems to work on the rest. never set the shock up any higher than you can take on your own fingers. it does take much to get his attention. if your dog cries when you shock it is to high. he should just jump or snap his head alittle. you can really mess up a good dog with to much shock. sorry to go on so long but i have seen guys that think the training collar is the magic tool for training. it takes more time than anything else to train a dog. every dog is differant just give time.