New SportDog Brand In Ground Fence Systems 100 Acre Capability Maroon Yellow Navy (see pics) Rubber Imported Soft W880BK8 Wmn 7 B Med Blk Slvr (see pics) Rubber Imported Soft It features a "conforma stretch" shoulder strap which aids in comfort and mobility Fits dogs 10 pound And up Contain an unlimited number of dogs with additional collars (sdf r) Collar gives Tone (beep) and vibration (Buzz) warning before moving to one of four static stimulation levels (you choose the best level for your dog) Transmitter features wire break alarm and built in Lightning Protector SportDog Brand In Ground Fence Systems – from the Parent Company of Invisible Fence Brand – Underground Wire Electric Fence – Tone