
The K301 series stable light source is primarily designed for continuous optical signal power measurement, optical fiber link continuity testing, link fault diagnosis, and link loss evaluation.
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The K305 Variable Optical Attenuator is a compact and portable device designed for accurate optical signal attenuation in fiber optic networks.

The K280 Optical Power Meter is a multifunctional fiber testing device designed for accurate optical power measurement, fiber loss testing, and network maintenance. It offers high sensitivity, long battery life, and data storage capabilities.

The K281 Stable Light Source is a compact, high-precision device designed for optical fiber testing, link fault diagnosis, and signal measurement.