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ABS MATERIAL: The electronic fence fault tester is made of durable ABS, which is cold-resistant and easy to carry. ACCURATE DETECTION: This electronic fence fault tester (power trigger) accurately detects if the fence is energized. LOUD BEEP: Simply add a switch and press the button near the fence; if the fence is energized, a loud beep will sound. SWITCH BUTTON: The electric fence alarm features a switch design, preventing unnecessary beeping. WIDE APPLICATIONS: Simple and easy to use, it is suitable for checking electric fences on farms, in gardens, for sheep, pets, horses, and livestock.