An e collar is a great dog training tool for those who know how to use it correctly. If you’re one of those trainers, then add this to your toolbox. In excellent condition. Only used a couple of times. Please note that this comes with the longer contact points for dogs with longer fur. Also included is a fake e collar. You can google for a pdf of the owner’s manual online or message me once you get your order and I can send it to you. Description: The Dogtra SureStim 7100H is one of the newest series from Dogtra. The SureStim feature gives the user a positive vibrating feedback in the transmitter to let the trainer know that correct stimulation was received by the receiver. The Dogtra 7100H is designed for larger sized dogs or dogs which need a high level of correction. The range on this unit is ½ mile, has nick and constant stimulation, as well as Dogtra’s non-stimulating pager feature. Low to High Power Unit. **Please be aware that my items are listed in several different platforms, so a listing may be ended suddenly due to it selling on a different platform. ** Questions? Leave a comment below!