sturdy, metallic chess clock as carry-on baggage

I am an amateur chess player and I am considering flying from the US to Europe with the following chess clock:

https://www.amazon.com/Chronos-GX-Touch-Chess-Clock/dp/B0015V3ZZ0

I am a concerned that the clock is a bit "scary-looking". It's also quite sturdy and made of metal (aluminum) so I guess (my Physics is a bit rusty) that it's like a Faraday cage with mostly empty space inside it (basically some tiny electronics, some wires and two AA batteries). As such, I am not sure how it shows / registers on the equipment they use and whether it might cause the operators to be concerned.

Is it safe to assume that I will be allowed to take it with me in the cabin as checked luggage? Or should I perhaps take it with me to the airport already opened so they can inspect what's inside it? (there is a panel that you need to unscrew to change the batteries or see what's inside — so a screwdriver is required).

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Is it worth buying a chess clock?

In any chess tournament, chess clock use is a requirement. Don't be a moocher by always using others' equipment. Even in causal games, a chess clock is useful for enforcing discipline of thought and also helps being courteous to an opponent.

Which chess clock is the best?

The Best Chess Clocks of 2022

#1 DGT 3000 Chess Clock.
#2 Analog Garde Classic Chess Clock.
#3 VTEK 300 Ultimate Chess Clock.

Are chess clocks still used?

Although Digital Chess Clocks are used more often now, Analog Chess Clocks are still occasionally used in tournaments. Analog Chess Clocks are the first type of chess clocks, and if you are good in reading Analog Clocks (unlike me) you will easily tell how much time is on your side.

Do chess clocks tick?

Each player had separate hourglasses to track time. They were eventually replaced by connecting two analog clocks. The time on one player's clock starts ticking as soon as the other one makes a move and punches the clock.

How to Use Classic Analog Chess Clock

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: veerasak Piyawatanakul, Saliha, Max Vakhtbovych, Nic Wood