Features MAIN PURPOSE: This optical fiber power meter is mainly used for measurement of continuous optical signal power, controlled by single chip microprocessor, with complete functions. BUILT IN DETECTOR: This fiber optic power meter adopts a built in detector, which can be well protected, will not be damaged easily, ensuring long term test accuracy. MULTI FUNCTION: This optical power meter supports functions such as lighting, automatic shutdown, memory wavelength, working frequency recognition, user calibration and more. UNIVERSAL INTERFACE: With a universal interface, this optical power tester supports SC FC ST 3 interfaces, plug and play. LONG ENDURANCE: Built in polymer lithium battery, with long lasting battery life, support multiple USB charging methods such as power bank, adapter, computer USB, car charging, etc. Specification: Item Type: Optical Fiber Power Meter Material: ABS Wavelength Range: 800~1700 Probe Type: InGaAs Measurement Range: -70~+6 Uncertainty: ±5% Standard Wavelength (nm): 850 980 1270 1300 1310 1490 1550 1577 1625 Display Resolution: Linear display: 0.1% logarithmic display: 0.01dBm Frequency Identification (Hz): 270, 1000, 2000 Static Current: ≤18uA Working Current: ≤25mA Range Time: ≥20H Charging Voltage: 5V Charging Current: ≤500mA Charging Duration: ≤3H Automatic Shutdown Time (min): 10 Power: Charging lithium battery, external input Battery: Rechargeable lithium battery 400mAh x 1 (built in) Package List:1 x Optical Fiber Power Meter1 x USB Cable1 x Portable Rope1 x User Manual Package List 1 x Optical Fiber Power Meter 1 x USB Cable 1 x Portable Rope 1 x User Manual