For the cheap price I have no miracles expected. At the beginning of the period of use and fully charged the luminance is acceptable and even a good half hour stable. Unfortunately, the luminosity or rather leaves the maximum performance of the battery declines over time. Even fully loaded and drawn directly from the mains socket, the collar is only poorly perceive and no longer sufficient for me.
+ The collar is very easy + Load quickly - Luminosity even with full battery after several charge cycles no longer sufficient - Battery not replaceable
