This system includes all needed components and can be easily set up in 1-2 hours with all needed components included.  No wires or digging required!  The included waterproof receiver collar fit is adjustable up to 27”, making it a great option for both smaller and larger dogs.  A low battery indicator on the collar will alert you when the collar battery (GAC11-16351) should be replaced.  The collar has 1 level of tone only for training and 5 adjustable levels of static correction so that you are able to choose which level works best for your dog. 
 Wireless circular boundary keeps your dog safely within your yard
 Adjustable coverage up to ½ acre & expandable for additional coverage area
 Easily set up in 1-2 hours with all needed components included.  No wires, no digging! 
 Waterproof receiver collar fit is adjustable up to 27 in. 
 Low battery indicator on collar alerts you when collar battery (GAC11-16351) should be replaced
 1 level of tone only for training and 5 adjustable levels of static correction
 Features: Adjustable Perimeter, Expandable, Portable
 Contains Batteries: Y
 Battery Size: Assorted
 Color: Gray
 Manufacturer: Radio Systems Corporation
 Assembled Product Dimensions (L x W x H): 9. 00 x 8. 75 x 9. 25 Inches