Use the Live Fence Indicator for instant reassurance that your fence is working, place permanently on your fence line and simply look for the flash when you drive or walk pass. Install the Live Fence Indicators at strategic locations for convenient visibility including driveways and near the home. Highly visible LED flashes to indicate fence is working effectively. Is easily visible during day and night (up to 1km at night). Low voltage cut off so will not flash if the fence voltage is too low.Simple and quick installation, simply place earth stake in the ground and clip onto fence wire or tape (up to 40mm width). Water and UV resistant for long life. No batteries required. Uses power from the fence.