Is it a step tracker?

No, the GGB-100 has a pedometer aka step walker

In addition to the purchase price, you have to invest in other expenses such as S/H? How about the warranty and how long takes to receive it?

I never get a warranty card when purchased from Japan, none of my Mudmasters have ever failed me but you can get a warranty card if purchased here in the US, but you’ll have to pay the full price

Is the gwg2000 1a3gf solar

gwg 2000 1a3gf donsent exsist at least that's what Google says. But the gwg 2000 1a3jf is a amazing solar powered watch there are more detailed videos on youtube about this watch. Specs for it also found on Google hope this helps its a killer watch. Product Features Brand : CASIO Series : G-Shock Mudmaster Model number : GWG-2000-1A3JF Release Date : 15 October 2021 Glass : Sapphire glass Inner anti-reflective coating Case material : Resin / stainless steel (IP treatment) Band Material type : resin belt type Calendar function : date day of the week display Body weight : 106 g Size : 61.2 x 54.4 x 16.1 mm Movement : Radio Wave Solar Manufacturer Warranty : 1 year warranty in Japan (return to us) Other Features Structure: Impact resistant structure (shock resist), dustproof / mudproof structure (mud resist) Water resistant: 20 ATM water resistant Time adjustment: Radio clock Japan / North America / Europe / China region / MULTIBAND6 Power supply / battery life: Tough solar (solar charging system) Sensor function: Direction measurement function, barometric pressure measurement function, altitude measurement function, temperature measurement function Glass: Internal anti-reflective coating sapphire glass Crown: Screw lock type crown Band mountable size: 145 to 215 mm LED: white Driving time: Approximately 6 months / In power saving state: Approximately 25 months Accuracy: Average monthly difference: ± 15 seconds (when not received)

Besides analog display, can it also display digital time readout at the same time as well?

Yes, day and date as well as 24 hour or regular time, I've had this watch since July 2022 and I do really like it. It does not have any Bluetooth pairing with the G-Shock App The watch is impressive!