This watch is so good and it works so well .this watch features has so amazing .i like this watch so much its design is so better than other watch bingo U8 has good battery backup and if this watch I charge one time it gave two day battery backup the design is so well it is easy to use this watch never hang .it is avabiable in many colours .i like this watch.i am so happy with my bingo watch so great watch its lights not damage for your eyes if we can use in dark place .bingo U8 is a amazing and very useful watch