[12/18/2020] Amazfit GTR 智慧手表，Amazfit GTR Aluminium Alloy Smartwatch,All-Day Heart Rate Monitor, Daily Activity Tracker Rate and Activity Tracking, 24-Day Battery Life, 12- Sport Modes, 47mm (W1902US1N)，目前特價$99.99 USD。Prime境內免運費 (學生可以免費試用Prime)。哪裡買：amazon。