Garmin Alpha 200 Bundle with TT25 - Limited Time OfferThis is for the purchase of a an Alpha 200 Handheld with TT25 track and train dog devices with standard flex band or pay to swap to a Zero Band. You select the number of dogs you want to add to the system. This unit will expand to up to 20 devices. Track and Train up to 9 miles. To add additional dog devices, simply select the size of the system you want (size = the number of dogs devices you want). Example: 1dog system is one handheld and one TT25.