petsafe stay & play wireless fence with replaceable battery collar – covers up to 3/4 acre – for dogs & cats over 5 lb – waterproof collar with tone & static – from parent company of invisible fence petsafe the fence transmitter is portable for rvs, cabins, and rental houses. just plug the transmitter into a standard outlet near the area where you want to contain your pet. the transmitter communicates with your pet's waterproof receiver collar and helps keep him in the designated area. the free to roam receiver collar is ergonomically designed for comfort and sized for pets weighing 5 pounds or more. choose from 5 adjustable levels of static correction to find just the right level for your pet, plus tone only mode which warns your pet with a beep. with just a few short training sessions, you'll create a secure boundary for your pet to enjoy freedom and fun!<br><br> system includes: transmitter with power adapter, waterproof receiver with adjustable 3/4" collar strap, 6-volt battery (rfa-67d-11), test light tool, quick start guide, 50 boundary training flags, short and long contact points, contact point wrench, and mounting bracket and hardware.<br><br><strong>features:</strong><br> <ul><li>portable wireless system sets up in 1-2 hours</li> <li>for dogs 5 pounds and up</li> <li>covers an adjustable circular area up to 1/2 acre (180 feet in diameter)</li> <li>works with the original wireless pet containment system (pif-300) and receiver collar (pif-275)</li> <li>expand containment size with additional wireless transmitters</li></ul>