Some things I don't like about the 3159 module used in the GW-M5610, GW-5000 and GW-S5600:
- Backlight duration is limited to 1.5 seconds. No option for 3 seconds.
- Can't show a second time zone on the main timekeeping screen.
Many other solar/atomic Gs have modules that can do both of these things. Among those I own, the GW-2310, GW-M850 and GW-9110 can all do these things. The popular GW-6900 can also do these things.
Most solar/atomic Gs, including the GW-M5610 and the others I mentioned above, can't display the current time in other modes, like the stopwatch and countdown timer modes. I'm not sure why this is, but it's an unnecessary limitation.
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