Does the GBM2100A-1A2 need a battery change?

No. Tough Solar charges from light through the dial, so it runs without routine battery swaps. Keep it in light regularly and it stays charged.

Can it sync time with my phone?

Yes. Bluetooth pairs with the Casio Watches app, which corrects the time automatically and adds features like world time and step tracking. It does not use radio-controlled atomic sync.

How does it compare with a full resin G-Shock?

The steel bezel and case give it a dressier look and more heft than an all-resin model, while the resin strap keeps it light. It is still shock resistant and rated to 200 m.

Is 44.4 mm too big for a small wrist?

It wears large. The 11.9 mm thickness helps it sit flatter, but anyone with wrists under about 6.5 inches should try one on first.

What comes in the box?

The watch ships with its original box and papers. The strap is resin with a steel buckle.

Is the glass scratch resistant?

It uses mineral glass, which resists everyday knocks but can pick up scratches over years of hard use. Sapphire is reserved for higher-tier models.

Where is the G-Shock GBM2100A-1A2 G-Steel with Solar cheapest?

At Walmart, for $224.95, 15% under what the other stores charge, as of our latest check.

What do buyers say about the G-Shock GBM2100A-1A2 G-Steel with Solar?

Rated 5 out of 5 from 1 ratings. Buyers like: Item arrived exactly as described; Good packaging; Fast delivery. Common complaints: One review noted a couple-day delay caused by DHL, not the seller; A difficult transaction due to customs requirements.