Innotek UltraSmart Contain N Train Dog Fence System Built-in 24/7 battery backup in the event of power failure. System comes equipped to cover 1/3 - 1/2 acre. Expands up to 25 acres with optional boundary kits p Waterproof Collar will stand up to rough punishment, even submerged in water. Patented Run-Through Prevention, only offered by Innotek, offers reliable and secure pet containmen Only Innotek systems allow you to adjust the field width, the distance from the wire to where your