This colour variant of the GM-2100C for some reason is not that common in the UK, and to be honest it's the most legible with its positive LCD display, as most of the others tend to have negative displays which are hard to see most of the time. Its only real downside are the two metal strap keepers which are not fixed and just move up and down the strap, so I swapped them for a Black resin keeper which is much better and suits the overall style of the watch ! The watch runs on two 396 (SR726W) batteries which should give approx 3yrs+ of use alarm and light usage dependent. Lume is applied on the hour and minute hands only, but the backlight compensates for this by illuminating the whole dial and LCD very well. The module inside the watch is the 5611 which is the same as many other GA-2100's which you can pick up for half the price of this watch, so what you are actually paying for is basically the stainless steel outer cover which is finished to a high standard and maybe the strap? Functions are fairly basic comprising of Time/date, World time, Stopwatch, count down timer, Alarm and day (via sub dial). Hope this review helps !