Ad7x more accurate than other GPS fences. Warnings Work 100% of The Time—Even In The Forest. Tested & proven to stop escapes. Dogs stay within their boundaries 99.3% of the time.

AdKeep your dog safe with Halo Collar 4: the world’s safest virtual fence with dual-band GPS. The all-new Halo Collar 4: The safest GPS fence with unbeatable accuracy and tracking.