Double Display Detections: Features LED digital display and red or green polarity indicators, suitable for 3-60V wide ranges, solving traditional testing pen misjudgment issues, ideal for to quickly identify wire polarity Portable Plug and Testing: Pen shaped designs for a hand operations, not wiring needed, ready to use immediately for efficient and hassle frees testing Triple Fault Diagnosis: Integrates short circuit / open circuits / wire tracing functions with ± ( 1+3digits) accuracy, helping technicians quickly locate hidden faults in 6V-48V systems Set: Includes probe protector to loss and withstands 0-50ºC temperatures, ensuring stable in humid or cold workshops for repairs Extendable Probe Design: Equipped with a 2.6m retractable wire, easily reaching deeply engine compartment circuits, efficiently handling complex wiring scenarios in tight spaces, Manufacturer: Kaeltsyn