This device is usually used for forearm training but can also be used to assess the physical parameters of your body and your age.

We don't sell this device ourselves. You can buy it, for example, from
https://www.amazon.fr/dp/B08M3KL2BD
https://www.amazon.fr/dp/B086QVJZ2S
https://www.amazon.fr/dp/B08T7CRVG6
https://www.amazon.com/dp/B08DLQKW96
https://www.amazon.com/dp/B08KGFV893

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en français:
Le grip mètre vous aide à déterminer la condition physique de votre corps.

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по-русски:
Измеритель хвата помогает определить физическое состояние вашего тела.

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en español:
El medidor de agarre le ayuda a determinar la condición física de su cuerpo.

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all'italiana:
Il misuratore di presa ti aiuta a determinare le condizioni fisiche del tuo corpo.