The x8 ultra plus watch supports bluetooth bt. v5.0 connection for a smooth and powerful experience. The watch size is 49mm, the same size as the original apple watch, and works on android and i phone ios phones. All languages ​​support x8 ultra plus watch supports arabic and english 【call function】 phone call reminder / call / recent calls via bluetooth 【health function】 heart rate / blood oxygen / blood pressure function / ecg / met / sleep monitoring / body temperature / breathing training / health reminder (sedentary reminder / drink reminder / sedentary reminder / exercise reminder / reading reminder) 【reminder function】 message notifications / app information (we chat / facebook / whats app) / weather / alarm 【sports】 history (steps / calories / distance) / indoor sports (running / cycling / sit-ups / push-ups / free movement) / outdoor sports (walking / mountaineering / other sports) 【other function】 side key setting / body temperature monitoring / dial key / customize watch faces / side voice assistant / nfc access control unlock / always-on mode / remote control short videos/gameplay/shake to take photos/play music/calculator/voice