1.43″ LARGE HD DISPLAY: Amazfit Bip U has a customized 1.43″ hd stylish square screen which offers a larger display area than a round watch face of the same width, so it can carry more information.” LONG 9-DAY BATTERY LIFE: This smartwatch deeply optimizes the power consumption of the components to bring long-lasting endurance of 7 days while keeping a slim watch body, which enables you to avoid frequent charges. MORE HEALTH METRICS: The Amazfit Bip U fitness smartwatch precise optical monitoring allows you to accurately track heart rate, blood oxygen levels, stress levels, breathing, quality of sleep, and sleeping patterns. SUPER LIGHWEIGHT DESIGN: Amazfit Bip U only weigh about 31 grams. an ultra-light design you can barely feel when striving for peak performance. WOMEN’S HEALTH TRACKING: With the female period tracking system bip u records and predicts the female menstrual cycle and send smart notifications reminders. Amazfit Bip U 7