The shipment is equipped with batteries and adopts digital signal -saving technology, which can be used for a long time. This advanced network cable tracker is designed specifically for tracking and testing network cables, with high and efficiency. It has powerful anti-interference technology to noise free operation, and is equipped with PoE testing function, including PoE anti burn function. Digital signal processing for precise tracking of low-voltage cables. Can improve visibility in dark environments., Manufacturer: Jnchdghwa