For secure, safe and reliable installation and maintenance of fiber optic networks. The FDT-2 series bring versatility and convenience to your optical testing. Sensitivity is improved by 10dB(compared with the conventional model). Optical fiber with R15mm is applicable. Tone signal detection capability. The FDT-2 can detect modulated tone signal over traffic signal. Fiber identification using tone signal(270Hz, 1kHz, 2kHz) When used in conjunction with a fiber detector, the compact and lightweight FDT-LS enables the operator to identify the fiber in question.