Digital watch
Long rectangular case with steel bezel
Solar dual power (auto change solar/battery power)
Each day a new color (LED light changes color automatically each day)
World time dual display: local time + 40 country times
Three-set alarm, daily alarm and hourly chime
Stopwatch, countdown timer, summer time and ATM water-resistant
50 years calender (2000 to 2049) and 12/24 hours mode selection
Japanese lithium battery + solar: three to six years
RD936:
Wide rectangular case with steel bezel
Hour, minute, second and days of week
Solar dual power (auto change solar, battery power)
EL backlight
Daily alarm and hourly chime
Stopwatch
12/24 hours mode selection
Japanese Y121 movement
Three ATM water-resistant
Japanese lithium battery + solar: three to six years