It is simple to use, has high accuracy and can be used with all laser types in the visible range. The software interface could have been more user friendly. It should also provide optionality of the measurement frequency, since it takes sometimes long time to measure certain levels of laser light. I would recommend this product if you are looking for an excellent linearity test system. We are using it to guarantee that our laser sources are operating at their best performance or to determineβ¦