The flash is powerful and easy to use. The workmanship is good. Unfortunately, at least my copy had a major shortcoming: When Using AA batteries (freshly charged, full power) remains even after charging a high-frequency whistling and crackling. So, as it would the device with the battery does not provide the flash capacitor full load. If one non-rechargeable batteries with 1.5V voltage a is the sound off. The only question is to which state of charge ....
