PetSafe PRF-304W Deluxe Radio Fence with Deluxe Ultralight receiver collar offers FIVE levels of correction, a beep warning followed by four levels of progressive correction.

• Powered for yards up to 25 acres.
  
• Deluxe Ultralight receiver collar offers FIVE levels of correction, a beep warning followed by four levels of progressive correction.
  
• Audio break alarm warns when wire has been broken.
  
• Progressive correction -- if your dog attempts to run through, correction level increases until he turns back.
  
• Safety features include protection against false signals and extra surge protection for storm-prone areas.
  
• Easy-to-follow operation manual and video.
  
• This system will support an unlimited number of collars (1 is included).
  
• Collar is completely waterproof.
  
• Adjustable nylon strap fits 12" to 18" necks.
  
• Exclusive Lifetime Warranty.