Voltage Detector Electrical Tester Pen 2-In-1 with LED Torch and Audible Tone N

It also has a handy built in LED torch function for use in low light locations. Handy LED torch function. BUILT IN LED TORCH. it can identify breaks in conductors by tracing along the cable from the source to the point where the indicator no longer illuminates; and also identify a blown fuse while in circuit.

eBay