Description: Test Information: Standard wavelength (nm): 850, 980, 1300, 1310, 1490, 1550, 1625 Working temperature (C): -10~+60 Connector: SC/FC/ST Interface Measurement range: -70~+3 Auto power-off time: 10min Continuous working hours: at least 48 hours Tester Battery: 5*AA Battery(not included) Pen Information: Output distance: 5Km Output wavelength: 650NM Working temperature (C): 0~+60 Pen Battery: 2*AA Battery(not included) Specifications: Tester Color: blue&light gray Pen color: blue&black Test Instrument Size: 130*63*29mm Pen Size: 17.5*2.6*2.6cm(Approx.) Support SC/FC/ST interfaces. With 7 wavelengths, drop resistant and wear resistant. With auto power-off and proofread function. The digital display screen with backlight, easy for you to read. Suitable for fiber optic communication, optical fiber sensing, etc.