Welcome to the store! 1. 10 Wavelengths and Adapter: Our fiber optic power meter VFL features 10 wavelengths (850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 nm) and includes SC, FC, ST adapters for use. 2. 10min Auto Shut-off: The 50KM VFL optical power network cable tester has a 10-minute auto shut-off function for quick and accurate measurements. 3. 650mAh Battery: The VFL network cable tester power meter adopts a sensitive chip and a robust internal structure for low power consumption and longer working time. It features an internal 3.7V Li-ion battery with a capacity of 650mAh. 4. Plug and Play: No warm-up time needed. The optical power network cable tester VFL offers plug-and-play functionality with precise measurements, relative power calculations, and calibration functions. 5. Communication Maintenance Use: The fiber optic power meter 50km VFL covers most requirements for communication technical maintenance. Item Type: Fiber Optic Power Meter Material: ABS Red Light VFL Detection Distance: 50km Power Supply: Internal 3.7V Li-ion Battery x 1, Capacity 650mAh (Battery included) Probe Range: InGaAs Wavelength Range: 850-1650nm Standard Wavelengths: 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650nm Display Resolution: Linear Display: 0.1% Logarithmic Display: 0.01dBm Operating Temperature: -10 - +60℃ Storage Temperature: -25 - +70℃ Auto Shut-off Time: 10 Minutes Battery Life: Not Less Than 40 Hours 1 x Optical Power Meter 1 x User Manual 1 x USB Cable 1 x Lanyard Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage or incorrect quantity, please contact us immediately for the best solution!