Features LCD SCREEN: The optical power meter adopts a color LCD screen display, with a measurement range of ‑70‑6dBm, and 5 grid real time battery level display, which is clear and intuitive. GOOD PERFORMANCE: Controlled by a single chip microprocessor, with built in detector for good protection, supports manual calibration, fiber optic work recognition, and wide testing range. MAIN PURPOSE: This handheld optical power meter is mainly used for measuring the power of continuous optical signals, supporting multi band high accuracy optical attenuation testing. POWER SUPPLY: This optical power meter has built in 400mAh lithium battery to ensure longer endurance, supports phone charging adapter and mobile power supply to charge the device. MULTIPLE FUNCTIONS: With automatic shutdown and wavelength memory function, support automatic frequency recognition, automatically displaying corresponding icons upon receiving fiber frequency. Feature: 1. APPLICABLE FIELDS: This portable optical power meter is widely used in fields such as fiber optic construction and maintenance, fiber optic comm, fiber optic sensing, and optical CAT. Specification: Item Type: Optical Power Meter Measurement Range: -70-6dBm Wavelength Range: 800-1700 Interface Type: 2.5mm Universal Adapter Probe Type: For InGaAs Detection Area: 300um Uncertainty: ±5% Standard Wavelength: 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm Display Resolution: Linear Display: 0.1%, Logarithmic Display: 0.01dBm Working Temperature: -20-60℃ Storage Temperature: -25-70℃ Drop Height: ≤ 2 meter / 6.6ft Static Current: ≤2uA Working Current: ≤35mA Charging Current: 300mA Charging Time: ≤3h Automatic Shutdown Time: 10 Min Range Time: ≥ 13h Standby Time: ≥ 3 Day Power Supply: Lithium Battery or USB External Power Supply Battery: 1 x 400mAh Rechargeable Lithium Battery (built in battery) Package List: 1 x Optical Power Meter 1 x USB Cable 1 x User Manual Package List 1 x Optical Power Meter 1 x USB Cable 1 x User Manual