Feature:1. MAIN FUNCTION: Handheld optical power meter series products are mainly used for measuring the power of continuous optical signals. Adopting a single chip microprocessor for control, with complete functions.2. WIDELY APPLICABLE: Widely used in fields such as fiber optic construction and maintenance, fiber optic communication, fiber optic sensing, and optical CAT.3. EASY TO USE: Optical power meter adopts a built in detector, which can provide good protection. Compact appearance, automatic shutdown function, wavelength memory function, manual calibration, fiber optic work recognition, and wide testing range.4. MULTIFUNCTIONAL: Supports lighting, automatic shutdown, memory wavelength function, working frequency recognition, and user calibration.5. SUPPORTS SC, FC, ST INTERFACES: Supports external power supply such as power banks and computers, supports linear (nW) and nonlinear indicators (dB), and supports extended battery life.Specification:Item Type: Optical Fiber Power MeterMaterial: ABSWavelength Range: 800 to 1700Probe Type: For InGaAsMeasurement Range: -70 to +10Uncertainty: 5%Standard Wavelength (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625Display Resolution:Linear Display: 0.1%Logarithmic Display: 0.01dBmFrequency Identification (Hz): 270, 1000, 2000Static Current: Less than or equal to 18uAWorking Current: Less than or equal to 25mARange Time: Greater than or equal to 20HCharging Voltage: 5VCharging Current: Less than or equal to 500mACharging Duration: Less than or equal to 3HAutomatic Shutdown Time (min): 10Power Supply: Rechargeable lithium battery, external inputBattery: 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