Why is this model so special and worth buying? Collar receiver has one of a kind Battery Status Indicator , always know how much battery left, no more guessing work. Fully charged receiver lasts many days of use before recharging is needed, standby time is up to 90 days. 650 yard range remote is made with rubber-coating upgrade, no more plastic cheap look. Remote can train up 1 or 2 dogs individually or both at the same time with sound, vibration or static shock. Collar strap has quick release clip buckle for easy use. Strap made of strong nylon material to withstand harsh conditions or tough trainings. Strap fit small medium and large dogs with neck 8"-24" 1-dog kit or 2-dog kit can be your choice to train your dogs with ease 1-Dog Remote Trainer Set 1-Dog remote dog trainer Collar to train one dog. The remote has the capacity to control two dog shock collars so you can upgrade 1-dog model to 2-dog model by adding an additional collar. If you have the one-dog remote trainer model, you can use either Dog 1 or Dog 2 mode to train. You can train your dog using one of the 3 beep,vibration or shock with or without verbal command. 2-Dog Remote Trainer Set Two dog model can train each dog individually or both dogs at the same time. The remote has a button to select one dog mode or two dog mode to meet your training purpose. You can preset the levels of vibration or shock for each individual dog or the same settings for both dogs when you select two-dog mode. Obedience & Behavioral Training One dog model or two-dog model can help you teach your puppies, young dog basic obedience training commands and correct bad behaviors like biting, chewing, digging, jumping on people, chasing cars or domestic animals or people, excessive barking, and more. Simply push a button to get your dog under control. Outdoor Sports,Field Trips,Camping and Hunting IPX 7 full waterproof, rugged remote dog training collar w/ 40 days of battery life can withstand tough weather conditions or harsh environment settings, which makes it ideal for outdoor activities such as sports, camping, filed trips or as remote dog shock collar trainer for hunting purposes. Read more T700 T600 GP330 T502 T720 B800 Remote Range 650 yard 650 yard 650 yard 880 yard 1100 yard Shock Levels 8 16 9 99 100 Programmed Training Capacity train up to 2 dogs separately or at the same time train up to 2 dogs separately or at the same time train up to 3 dogs separately or at the same time train up to 3 dogs separately train up to 3 dogs separately one dog use Trainer Type remote trainer only remote trainer only remote trainer only remote trainer only remote trainer and bark collar Bark collar only Dog Size small to large small to large small to large Small to large Small to large Small to large Collar for Neck Size 8"-24",nylon fabric with side release buckle 8"-24",nylon fabric with clip buckle 7"-24",TPU 8"-24",nylon fabric with clip buckle 6"-24", nylon fabric with clip buckle 6"-26", nylon fabric with clip buckle