Welcome to our store! 1. 10 Wavelengths: This fiber optic power meter features 10 wavelengths: 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 nm, and comes with SC FC ST adapters for versatile use. 2. Automatic Shutdown Function: The VFL optical network cable tester has a 10-minute automatic shutdown function, ensuring quick and accurate measurements. 3. Relative Power Calculation: No warm-up time needed! This optical network cable tester offers plug-and-play functionality with precise measurement, relative power calculation, and calibration features. 4. Low Battery Consumption: The VFL network cable tester utilizes a sensitive chip and robust internal structure, ensuring low battery consumption and extended working hours. 5. Comprehensive Requirements: This fiber optic power meter VFL covers most requirements for communication engineering maintenance. Item Type: Fiber Optic Power Meter Material: ABS Red Light VFL Detection Distance: 30 km Power Supply: AAA batteries required x 2 (shipped without batteries) Probe Range: InGaAs Wavelength Range: 850-1650nm Standard Wavelengths: 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650nm Display Resolution: Linearity Display: 0.1 % Logarithmic Display: 0.01dBm Operating Temperature: -10 - +60 ℃ Storage Temperature: -25 - +70 ℃ Automatic Shutdown Time: 10 minutes Battery Life: Not less than 40 hours 1 x Optical Power Meter 1 x Lanyard 1 x Instruction Manual Customers are our top priority. If you discover any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.