Mens Solar Powered Watch LED Luminous Analog Digital Wristwatch Case Material: Stainless Steel Band Length: 23cm Band Width: 21mm Dial Diameter: 45mm Case Thickness: 10mm Band Material Type: Stainless Steel Weight: 160g Main Function: *12 a display (,minutes and seconds,month day week) *12/24 hour format choice *Alarm (with sleep function) *Strike on the hour *A stopwatch(1/100 SEC precision) Keys functions: Normal time status display for : time , minutes and seconds , month , day , week A key: 3 seconds cold light B key: a stopwatch start and stop: when in the state for time rises C key: normal time state as a into a stopwatch mode pick two trips to the alarm set mode According to three times the time when adjusting model D key: a stopwatch after zero Normal time setting: 1. in normal time under the state according to C three times , into the adjustment mode Type, this time the seconds flashing ,according to B could be the "00" 2.Press D in to flashing ,and then adjusted to the time required for according to B 3.According to the D again,this time flashing . According to B adjustment, 4. According to the same method,Can be adjusted respectivly month day week 5.the adjustment according to return to normal time state C. Alarm set : 1,every state in the normal by C secondary in to alarm shape state(English display shows AL) 2.According to B can choose :alarm an time open on the hour and open alarm the whole point of time open - an alarm. the whole point of time are closed. 3.Press D when flashing ,press B to adjust 4.And then D sub-flashling, press B to adjust. 5.After adjustment ,press C once to return to the normal time.