Professional LCD Display Fiber Optical Identifier Portable 4-in-1 Clamp 10mw Visual Fault Locator Optical Fiber Direction Identifier Suitable for 3.0/2.0/0.9/0.25mm Fiber Line Fiber optical identifier is an essential tool for fiber maintenance during maintenance, installation, cabling and recovery for lossless fiber identification. Features: Test and identification of power direction and frequency detection function. The identifier can directly test 0.25mm bare fiber, 0.9mm pigtail, 2mm or 3mm fiber jumper without need to change the adapter frequently. Clear LCD screen display, clear handwriting, convenient to read, easy to operate and measure. Fine quality material body, wear resistant and comfortable hand feeling. Compact and lightweight, easy to carry. Can identify 270Hz, 1Hz, 2KHz signal frequency. Specifications: Color: blue+black Material: plastics Wavelength recognition range: 800-1700nm Optical fiber cable type: 3.0/2.0/0.9/0.25mm Identify signal frequency: 270Hz/1kHz/2kHz Optical fiber signal display detection range: 13 to -50dBm Signal direction detection range: 13 to -35dBm Signal frequency detection range: 13 to -30dBm Output power: ≥10mV Interface: 2.5mm Battery: 2 * AA battery (not included) Item size: 220 * 38 * 28mm / 8.7 * 1.5 * 1.1in Item weight: 145g / 5.1ounce Package size: 250 * 81 * 53mm / 9.8 * 3.2 * 2.1in Package weight: 450g / 1.0lb Packing List: 1 * Fiber Optical Identifier 1 * Storage Bag 1 * User Manual