This Jilong 10mW Visual Fault Locator is a professional fiber optic testing instrument, adopting 650nm visible red laser. It can quickly locate fiber crack, poor connection and excessive bending points along the optical cable. Equipped with a universal 2.5mm adapter compatible with SC, FC and ST connectors. Supports continuous wave and pulse flashing mode. Pocket-sized, sturdy housing, widely used for FTTH, cabling maintenance and fiber fault detection.