Boundary radius range: 1. Level: 40m/ 131ft; Level 2: 120m/ 394ft; Level 3: 160m/ 525ft; Level 4: 220m/ 722ft. -When installing you should put the transmitter high enough and open it wide enough to make sure that there is no barrier of fence debris between the transmitter and receiver (outdoor unobstructed use).
eBay