Check your electric fence quickly and easily with the Lydite Neon Bubble Tester. Simply insert the top probe into the wire and the bottom probe into the ground—no extra tools or batteries needed. Built-in neon lights display different voltage levels for clear, instant readings. Works on all common fence materials including metal wire, poly wire, rope, and tape. Durable, reliable, and ideal for farms, gardens, and livestock areas. Manufacturer-direct quality ensures long-lasting performance.