1、Multifunctional: This fiber optic cable tester has a 2 in 1 OPM and VFL function, eliminating the need for a separate device, which makes it more convenient and powerful. 2、Fast And Accurate: This fiber visual fault locator is fast and accurate, without waiting to warm up, plug and play with ‑70‑+10dbm measurement, relative power calculation and calibration function. 3、10 Wavelength: This fiber tester supports 10 wavelengths and light sources, for 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650nm, with SC, FC, ST adapters. It covers most of the needs of communication engineering maintenance. 4、Compact And Portable: This optical fiber power meter is small in size and light in weight, which makes it very convenient to carry around with you and use, and easy to use. 5、Wide Application: This optical power meter has a wide range of applications, which can be used for communication network construction, connection testing between data centers and servers, fiber optic communication, data centers, sensing networks and so on. Item Type: Fiber Optic Cable Tester Material: ABS Measurement Range: -70-+10dBm Calibration Wavelength: 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm Detector: InGaAs Accuracy: <±3% (-10dBm, 22°C) Resolution: Linear: 0.1%, Nonlinear: 0.01dBm Working Temperature: -10°C-+50°C Storage Temperature: -20°C-+70°C Relative Humidity: 90% (+30°C) Battery: 2 x AA Batteries (Not Included) 1 x Fiber Optic Cable Tester 1 x Carrying Case 1 x Manual 1 x Accessory