Feature: 1. Combine 8 functions with highly integrated optical time domain reflectometer, event map, stable light source, optical power meter, visual fault locator, cable sequence calibration, cable length measurement and lighting functions. 2. It can quickly detect breakpoints, universal connector and supports 600 internal storage and memory card. 3. 3.5 inch colorful LCD screen, easy to read the data, this tester is convenient and easy to operate. 4. USB data storage and built-in 4000mAh lithium battery for USB charging, more practical to use. 5. The housing is made of high quality material, sturdy, not easy to be damaged, durable and has long life. Specification: Condition: 100% Brand New Item Type: Optical Fiber Tester Material: ABS Model: JW3302S Wavelength: 1310nm/1550nm±20nm Fiber Type: G.652 fiber Dynamic Range: 24dB/22dB Event Blind Zone: 3 meter / 9.8ft ATT Blind Zone: 8m / 26.2ft Test Range: 500m~60km Pulse Width: 3ns~10us Distance Measurement Accuracy: ±(1m + sampling interval + 0.005% x test distance) Loss Accuracy: ±0.2dB/dB Sampling Point: 16k~128k Sampling Resolution: 0.05m~8m Reflection Accuracy: ±3dB Internal Data Storage: ≥600; External: Memory Card (not included) Laser Safety Level: II File Format: SOR Standard File Format Connector: For SC/FC OPM: Wavelength Range: 800nm~1700nm Interface Type: Universal Connector for FC/SC/ST Test Range: -50dBm~+26dBm Uncertainty: ±5% Frequency Identification: CW/270/330/1k/2kHz Calibration Wavelength: 850/980/1300/1310/1490/1550/1625/1650nm LS: LD Type: FP-LD Output Wavelength: 1550nm±20nm 1310nm/1550nm±20nm Output Power: ≥-5dBm Modulation: 270/330/1k/2kHz Frequency Stability: CW, ±0.5dB / 15min (test after 15min of preheating) Connector: For SC/FC VFL: Working Wavelength: 650nm±20nm Output Power: ≥10mW Mode: CW/1Hz/2Hz Connector: For SC/FC RJ45 Cable Length Measurement: Test Range: 300m / 984.3ft Other Parameters: Display: 3.5-inch Color LCD Data Interface: Micro USB External Storage: Memory Card (Not Included) Power Supply: Lithium Battery: 3.7V, 4000mAh, Power Adapter: 5VDC, 2A Battery Life: Standby>20h; Measurement Time>12h Product Size: Approx. 173 x 82 x 37 mm / 6.8 x 3.2 x 1.5 in Weight: Approx. 743g / 26.2oz. Package List: 1 x Tester1 x English User Manual1 x Plug1 x Data Line1 x Adapter Head1 x CD1 x Black Bag10 x Cleaning Paper