This electric fence siren is easy to carry, attaches to fence wire or tape, is easy to use, flashing light indicates low fence voltage. Made of high-quality ABS and copper materials, safe, not easy to damage, can be used for a long time. The electric fence alarm is exquisite in workmanship, waterproof and stable in performance, allowing you to use it with confidence. This electric fence alarm is mainly used to detect whether the electric fence voltage is normal, widely used on farms, outdoors, in gardens. The electric fence voltage warning light is used together with the fence host and can be used for types of electric fences, including steel wire, poly tape, etc. Colour: Black material: plastic Battery: 3V, 1 x CR2032 button cell battery (Battery not included) Package contents: 1 x Fence warning (Battery not included) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.