Feature: 1. MULTIPLE USAGES: OTDR optical time domain reflectometer can also be used as visual fault locator and optical power meter, portable design is simple and practical. 2. WIDE APPLICATION: Used for network construction, optical fiber breakpoint identification, optical cable length measurement, and relative optical power loss calculation. 3. TESTER FEATURES: The optical fiber tester is equipped with USB data interface, built in 4400mAh li battery, 3.97in 800x480 IPS color touchable screen, easy to operate. 4. WORKING RANGE: The wavelength range of the optical power meter is 800‑1650nm, supports 6 calibration wavelengths, and the measurement range is ‑50~+26dBm. 5. PLASTIC HOUSING: The shell of the optical fiber power meter is made of ABS plastic, which has good toughness and erosion proof, suitable for various environments. Specification: Item Type: OTDR Fiber Optical Tester Model: AUA28A OPM: -50~+26dBm Material: ABS Wavelength: 1550nm (20dB) Dynamic Range: 20dB Measuring Distance: 0-60km Fiber Optic Connector Type: 9/125μm SM Unit: Meter, Inch, Mile Reflection Blind Area: 2 meter Data Storage: 200 Groups Display: 3.97in Resolution: 800 x 480pixels IPS screen (touchable screen) Power Supply: 7.4V 4400mAh lithium ion battery (built in battery) can be used for more than 5000 times Visual Fault Locator: Wavelength: 650nm Output Power: ≥10mW Mode: CW, 1Hz, 2Hz Optical Fiber Type: SM, MM Optical Power Meter: Measuring Range: -50~+26dBm Wavelength Range: 800-1650nm Calibration Wavelength: 850 1300 1310 1490 1550 1610 Detection Type: For InGaAs Optical Light Source: Emitter: FP-LD Wavelength: 1550nm Output Power: ≥-5dBm Fiber Type: SM. Package List: 1 x Reflectometer3 x User Manuals1 x Cotton Swab Bag1 x CD1 x Sling1 x SC Connector1 x FC Connector1 x USB Line1 x Power Cord1 x Storage Bag1 x FC-LC Adapter