SAFE AND CUSTOMIZABLE Gives your pets room to play with up to 13 of an acre coverage expandable up to 25 acres with the purchase of additional wires and flags sold separately LIGHTWEIGHT RECEIVER COLLAR Designed for dogs over 8 lb with neck sizes from 6 to 26 inches ADJUSTABLE WATERPROOF RECEIVER COLLAR Features 4 levels of static correction plus toneonly mode for training LOW BATTERY INDICATOR 12 month expected battery life depending on use with easy to install RFA67 battery CREATE KEEPOUT AREAS You can create additional boundaries around areas such as gardens pools and swing sets in your yard SURGE PROTECTOR Protect your InGround Fence from surges or spikes USBASED CUSTOMER CARE Our pet product experts are here to help you and your pet and are available by phone email or chat if you have any questions QUALITY PROMISE PetSafe brand has been a trusted global leader in pet behavior containment and lifestyle innovations since 1998 to help keep your pet healthy safe and happy