MEASURE RANGE: LCD display screen indicates voltage levels from 0.3kv to 9.9kv; Wire Length is 57 inches POWER SAVING DESIGN: The electric fence tester will turn on at the detection of a pulse and turn off after about 4 seconds when no pulse is detected This electric fence tester and fault finder can test voltage levels on your fence line and fence controller Keep this hot wire fence tester on hand for regular fence line maintenance Helpful for finding fence line faults