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smart watches for men women and child smart activity tracker waterproof blood pressure smartwatch smart watch,smart watch with calling niversal smart watch stylish smart watches compatible with android the watch should be charging 2 hours at least before use security code the sync software can open in sync app already installed and accessibility ,the mobile will show bluetooth connected done after 2-5min,the watch will inform you the time of sync with phone,than the sync switched on.syi