Features: Lightweight, portable and cost-effective. One-click operation, clear test data, make you an OTDR test expert. Integrated with Visual Fault Locator system, can easily detect the fault location of the dead zone. Using rubber key, dust-proof, waterproof, shockproof ability, suitable for field maintenance work. Using large capacity battery, long working time, suitable for long time field work. Fitx and access network engineers for construction and maintenance fault location.