Features Wide Application: This optical power meter has a wide range of applications and can be used in fiber optic construction and maintenance, fiber optic communication, fiber optic sensing, optical CAT and other fields. Built In Detector: This light power meter has a built in detector that keeps it well protected from damage and has a longer service life. Multifunctional: This light power meter has a variety of functions, such as automatic shutdown function, wavelength memory function, manual calibration, fiber optic work identification, wide test range, illumination, automatic shutdown, memory wavelength Supports Multiple Interfaces: This optical power meter supports SC, FC, ST interfaces, which is very convenient and practical. Single Chip Microprocessor: This light power meter is controlled by a single chip microprocessor for good performance and full functionality. Specification: Item Type: Mini Optic Fiber Cable Tester  Material: ABS Wavelength Range: 800-1700 Probe Type: InGaAs Measurement Range: -50-+26 Uncertainty: ±5% Standard Wavelength: 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm Display Resolution: Linear Display: 0.1%, Logarithmic Display: 0.01dBm Frequency Recognition: (Hz) 270, 1000, 2000 Static Current: ≤18uA  Operating Current: ≤25mA  Endurance Time: ≥20H Charging Voltage: 5V Charging Current: ≤500mA  Charging Time: ≤3H Automatic Shutdown Time: 10min Power Supply: Rechargeable Lithium Battery, External Input Battery: Rechargeable Lithium Battery 400mAh x 1 ( Shipped With Built In Battery ) Package List: 1 x Fiber Optic Power Meter 1 x USB Cable 1 x Portable Rope 1 x Manual Package List 1 x Fiber Optic Power Meter 1 x USB Cable 1 x Portable Rope 1 x Manual