Man is known for its very old relation with 'time'. From my memories to our events, all this depends 1 hand thing and which is 'time'. We always must know what time is it and the first thing for it which comes in our thoughts are the 'watch'. Of course https://botdb.win/wiki/Transparence_rvolutionnaire_dcouvrez_la_magie_des_crans_LED_transparents