Description: This high-precision fiber optical meter supports 3 kinds of connectors and 7 wavelengths to make it suitable for various test environments. And the display of absolute power dBm and relative power db is able to meet your different needs. In addition, its high sensitivity with low errors ±0.5dB helps you get accurate values, which makes it so reliable and practical. The three AA batteries (not included) power supply gives you super long standby time up to 48 hours. Features: High-precision Meter: The fiber optic cable tester adopts high sensitivity with low errors of ±0.5dB to ensure the accuracy of values. Wide Measuring Range: This fiber optical power meter measures from -70dBm to 6dBm, which allows you to measure more optical devices conveniently. Multiple Power Units: The tested power are shown with the forms of dB, dBm, mW, uW, nW. And there are 7 types to show wavelength. Wide Wavelength Range: It supports 3 kinds of connectors and 7 wavelengths, including 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm to make it suitable for different test environments. Absolute power and relative power: When wavelength is chosen, the screen will show the present value, including linear value of absolute light power and non-linear value. When the wavelength is set in the mode of absolute light power, both absolute power and relative power will show. Long Standby Time: Three AA batteries (not included) power supply gives you super long standby time up to 48 hours, which makes it very reliable and practical. Specifications: Product type: Fiber Optical Power Meter Measuring scope: -70dBm - 6dBm Error: ±0.5dB Wavelength: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm Power display unit: dB, dBm, mW, uW, nW Standby time: 48 hours Display resolution: Linear indication: 0.1%; Logarithmic indication: 0.01dBm Auto power-off time: 10 minutes Power supply: 3 x AA batteries (not included) Weight: 400g Product size: approx. 190 * 100 * 48 mm/ 7.48 * 3.94 * 1.89 in Working temperature: -10 - 60℃ Storage temperature: -25 - 70℃ Package List: 1 * Optical Power Meter 1 * User Manual 1 * Warranty Card.