Remote dog training Mode Under this mode,user can train the dogs(up to 3 dogs,Purchase additonal collars so all your pets can play satety together) manually.Press shock/vibration/speaker button to send different punishments to corresponding dog via every single channel. Wireless Dog Fence Mode Under this mode,user can set a certain radius distance from controller to receiver for your dogs.Once the dogs get out of it,the fence system would trigger sound/shock/vibration to dogs as what user set up.punishment get stop if the dogs get back to the circle.The radius distance is adjustable from 30 feet/100feet/…..to 800 feet for level 1 to level 16. Large Screen LED: An easy to read display shows you how far your pet’s play area expands; the screen also has warning indicators to let you know if there is an error with the wireless fence system Portable: This portable system is terrific for camping, vacation homes, or anywhere you travel ,Good for more than 5BL or more than 6 months Dogs,Cats,Goats. Great for bigger areas:Very nice to be able to use it as a shock collar with the remote fence without burying a wire.you can change the parameters for how far the dog can go. large backyard and sometimes it is nice to just take the base station with you so the dog can travel freely with youWarraty:30 days money back,1 year against manufactures defects.