my son had flashed on design ... after 3 weeks of waiting, she finally arrives (normal is Hong Kong ...) Day 1: the loop falls: lost screws, because obviously too narrow. I retrieves a screw of an old watch. 2 days later, HS cells. I'll buy two CR016 batteries (more than the watch) ... except that the lights are displayed only if pressure is put on the closing cover. Cheap, but ultimately too expensive!