NOYAFA NF-916S Laser Distance Measurer: Next-Gen Mini Optical-Fiber Cable Tester - Powermeter 850 980 1310 1490 1550 1625nm(Wavelength) Unit dBm or mw uW nW, REF Frequnce 270Hz 1KHz 2KHz, Continuity test Yes, VFL Steadyon slowflashing fast flashing, AUTO off On off Lamp Yes, Low battery warning Yes, Power supply 3.7 Vlithium batery, Size 128*61*32mm Više informacija na linku