The meter is designed for POF (plastic optical fiber) and short wavelength applications (visible and near infrared). The meter optimizes a Silicon detector suitable for large core fibers. It is the ideal tool for working with shorter wavelengths whether the system is glass, plastic or multimode fibers.The meter measures optical power, loss (attenuation) and optical return loss. The meter is calibrated at industry standard wavelengths (NIST traceable). The zero reference function is ideal for testing fiber optic cables in dB, the reference value is saved in the power meter. A universal 2,5 mm universal adapter with a threaded housing is included, other adapters are also available as an accessory. Due to the backlight the data is always visible. The meter is delivered in a protective rubber boot.