Features Directional Light Indicators: Equipped with intuitive left and right indicator lamps, this optical fiber identifier effortlessly determines the direction of the sign within a fiber. Even when the fiber is actively transmitting data, the relevant direction lamp will illuminate, signifying the FlowOf information. Advanced Sign Detection: The integrated buzzer aids in the identification of sign frequencies, offering accuracy detection of modulation signs at 270Hz, 1KHz, and 2KHz. This optical fiber identifier feature allows for seamless recognition and differentiation of various sign patterns. High-Brightness LED Light: Designed with a bright, steady LED light that produces a focused beam, this optical fiber identifier enhances the efficiency of line detection tasks. Its ability to perform online tests without disrupting the existing light source is invaluable for maintaining continuous operation. Precise Measurement: This optical fiber identifier promises exceptional accuracy in measurements, providing reliable results. Take it to your worksite with the utmost confidence, knowing it will contribute significantly to your tasks. Durable ABS Construction: Constructed from superior ABS material, this robust optical fiber identifier resists scratches and damage. Its solid build ensures lasting durability, offering you a reliable tool that withstands the rigors of frequent use. Specification: Item Type: Optical Fiber Identifier Mode: A 40 Wavelength Identification Range: 800 to 1700nm Optical Fiber Cable Type: Approx. 3mm / 0.12in, 2mm / 0.08in, 0.9mm / 0.04in, 0.25mm / 0.01in Direction of Sign Lamp: Sign Lamp Display Identification Sign Frequency: 270HZ, 1kHz, 2kHz Accuracy: +10dB to -30dBm, +10dB to -25dBm Sensitivity Range: +10 to -50dBm Identification Sign Type: CW, 270Hz ± 5%, 1kHz ± 5%, 2kHz ± 5% Receiver Type: Dia 1 mm In GaAs2pcs Adapter Model: Dia 0.25(Applicable for Bare Fiber) Dia 0.9( Applicable for Dia 0.9 Cable) Dia 2.0( Applicable for Dia 2.0 Cable) Dia 3.0(Applicable for Dia 3.0 Cable) Sign Section: Left, Right LED Sign Direction Test Range (dBm, CW/0.9mm light): -46 to 10 (1310nm) -50 to 10 (1550nm) Sign Power Test Range (dBm, CW/0.9mm light): - 50 to +10 Frequency Test Range (dBm, average value): Dia 0.9, Dia 2.0, Dia 3.0 -30-0(270Hz,1KHz)-25-0(2KHz) Dia 0.25 -25-0(1KHz,2KHz)-20-0(2KHz) Insertion Loss: 0.8 (1310nm) 2.5 (1550nm) Red Light Test Burst: 650nm ± 10nm Power Detected by Red Light: Greater than 10mW Alkaline Battery: 1.5V AA x 2 (shipped without battery) Operating Temperature: - 10 to +60 (℃) Storage Temperature: - 25 to +70 (℃) Package List:1 x Optical Fiber Identifier1 x Manual 1 x Storage Box  Note:Four in one universal fixture, no need to replace the fixture for online testing, to ensure no damage to the optical fiber. Package List 1 x Optical Fiber Identifier 1 x Manual 1 x Storage Box