Feature: 1. [Multi Function] This optical power meter has multiple functions, including continuous measurement of optical signal power, testing fiber optic cable on off, RJ45 cable test and line finding. 2. [Convenient Features] Equipped with automatic power on off, adjustable power, wavelength memory, automatic frequency recognition function, support lighting and data storage. 3. [Calibration and Compatibility] Users can easily calibrate this power meter, which supports SC, FC, and ST interfaces and supports linear (nW) and nonlinear indicators (dB). 4. [Ergonomic Design] Designed with ergonomic body, this power meter is comfortable to use, crafted using advanced cold molding techniques, ensuring both aesthetics and durability. 5. [Wide Application] Ideal for optical cable construction and maintenance, fiber optic communication, optical cable sensing, and optical CAT applications, this power meter is widely used in various industry fields. Specification: Item Type: Optical Fiber Power Meter Material: ABS Wavelength Range: 800 to 1700 Detector Type: InGaAs Measurement Range (dBm): -70~+10 Uncertainty: ±5% Standard Wavelength (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625 Display Resolution: Linear display: 0.1% logarithmic display: 0.01dBm Red Light Working Wavelength (nm): 650 Test Range (KM): 15 Frequency Identification (Hz): 0, 270, 1000, 2000 RJ45 Line Finding Distance (m): 200 Input Voltage (V): 3-6 Working Temperature (℃): -10~+60 Storage Temperature (℃): -25~+70 Automatic Shutdown Time (min): 10 Battery Continuous Working Time (h): ≥48 (measured by a single power meter) Battery (mAh): Rechargeable lithium battery 1100mAh x 1 (built in). Package List: 1 x Optical Fiber Power Meter1 x USB Cable1 x Portable Rope1 x Ceramic Tube1 x User Manual