I'm very satisfied with radio-clock ... and this as a Swiss "CASIO Ausländeruhr" ... I work at CH-SBB-distance traffic (Kondukteur) and need this clock daily. It works in their size but sporty elegant and very modern with blue leather strap. She goes to the second and is highly recommended. About water resistance I can not say anything because I do not benütze generally all my watches for swimming or diving. (... And this is also recommended in this beautiful leather strap). This clock is really recommending best !!! By the way; For a few francs, it is advantageous to be adjusted by a watchmaker this clock without further ado ... I left it for CHF 15.- make within one day ... save yourself a lot of time for reading and setting!