Portable instrument used for the visual detection of faults in fiber optic cables and for identifying patch cords and drop cables in FTTH installations. It emits a Class 2M laser beam at a wavelength of 650 nm ± 20 nm, with an output power between 0.5 and 1 mW in pulsed mode at 2 Hz and a 50% duty cycle. Compatible with both single-mode and multi-mode fibers, it has a range of up to 3 km. The design includes continuous emission mode (CW) and pulse burst mode, with an LED indicator for power and operation status. It supports SC, ST, FC, and E2000 connectors with 2.5 mm ferrules. The device is supplied without batteries and includes a protective carrying case and wrist strap for added safety. It operates within a temperature range of -10 °C to 60 °C, has maximum dimensions of 18 x 3.5 x 2 cm, and weighs less than 200 grams. The product comes with a one-year warranty under normal usage conditions.