It can be used not only in the United States, but also all countries which people speak English with American accent.
English, French, German, Spanish, Italian, Portuguese, Russian, Polish, Ukrainian, Japanese, Korean, Arabic, Turkish, Hebrew, Thai, Vietnamese, Czech, Indonesian, Greek, Serbian and Catalan
Open Zepp app > Profile > My devices > Amazfit GTS 2 mini > Watch settings > System Language
Yes. Amazfit GTS 2 mini has a water resistance grade of 5ATM. It can be used for water activities in shallow water such as in a swimming pool or at the beaches. However, it does NOT support sauna, hot springs and diving.