The Casio Edifice ECB-900DB is a good option for anyone who wants a steel watch to wear for years. It has regular hands, a digital display and two features that make daily use easier: solar charging and Bluetooth time adjustment. There is no daily charging cable, and a paired phone can help keep the time correct.

The ECB-900DB-1ADR EX499 comes with a black dial and red details. The ECB-900DB-1BDR EX500 has blue details instead. The features are the same on both, so you can choose the colour you like.

What Bluetooth Does for You

Start by pairing the watch with a compatible phone through the CASIO WATCHES app. The phone then helps the watch adjust its time. This saves you from setting the hands manually whenever a correction is needed.

The watch attempts an automatic time update four times a day. For this to work, the paired phone must be within range, Bluetooth must be on and the app must be running. You can also request an update manually.

It connects for the adjustment and disconnects once that is done. It does not need a continuous Bluetooth connection.

Solar Power Means Less Charging Work

Casio calls its charging system Tough Solar. Light reaches the solar panel on the dial, and the energy is stored in a rechargeable battery. Both sunlight and indoor light can charge it, although brighter light works faster.

That makes the ECB-900DB convenient to wear every day. You do not have to plug it in each night. Give it regular exposure to suitable light and check the battery-level indicator when needed.

A full charge provides about six months of normal use without further light, according to Casio. Solar charging still needs some care: a watch left in a dark drawer will eventually lose charge.

A Useful Feature When You Travel

Imagine landing in another country and wanting your watch to show local time. Once your phone has the correct time and time zone, you can use Bluetooth to update the watch. This is easier than changing the settings by hand.

You can also choose a destination in advance and swap between Home Time and World Time. The watch offers 39 time zones, while the app gives access to approximately 300 world-time cities. It is a useful setup for travel or for keeping track of time back home.

Red or Blue, With the Same Steel Build

Both versions have a stainless-steel case and bracelet, mineral glass and 100-metre water resistance. The tachymeter bezel and coloured dial details give them a sporty look.

The red model stands out more, while the blue model offers a different colour choice without changing the watch underneath.

Size is worth checking before buying. The case measures 51.5 × 48 × 13.9 mm, and the watch weighs 163 g. This is a fairly large, heavy watch, so people with smaller wrists should pay attention to the fit.

More Than Just Hands and a Digital Display

The hands let you read the time in the usual way. The digital display handles extra functions, including a countdown timer, five alarms and a stopwatch with storage for up to 200 lap records. You can transfer recorded stopwatch data to the phone.

Double LED lighting lights up the dial and digital display in the dark. If the hands cover the LCD, the hand-shift function moves them out of the way.

Why These Watches Are Worth Considering

The main appeal is how easy these features make regular use. Solar charging cuts down the charging routine. Bluetooth helps with time correction, and the travel functions are useful when moving between time zones.

If you like an analogue-digital watch with a steel bracelet, either version is a good choice for long-term use. Choose red or blue based on your taste, and check that the size feels comfortable on your wrist.

For more options, see the Casio Edifice Bluetooth range and the Casio Edifice ERA-130D-2A.

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