Data comes from HONOR lab. 9.9 mm is the thickness of the watch measured at its thinnest point (the distance from the watch surface to the edge of the case, excluding the sensor area). Actual measurements may vary between individual products. All specifications are subject to the actual product. Data comes from HONOR lab. 27 grams is the actual weight of the watch (without strap), the weight of the product and related specifications are theoretical values only. Actual measurements may vary between individual products. All specifications are subject to the actual product. Battery life data comes from HONOR lab. Actual battery life may vary due to individual product differences, usage habits, and environmental factors. Please refer to the actual experience. 23 days: Long battery life mode usage scenarios, paired use of HONOR phone and watch, continuous heart rate monitoring enabled (smart mode) and healthy sleep, message notifications (100 messages, 2 calls, 3 alarms/day), screen turned on 200 times/day, app data synchronized manually (once/day), Bluetooth calls (15 minutes/week), exercise (90 minutes/week on average with GNSS turned on); 9 days: AOD mode usage scenarios, paired use of HONOR phone and watch, AOD enabled, continuous heart rate monitoring enabled (smart mode) and healthy sleep, message notifications (100 messages, 2 calls, 3 alarms/day), screen turned on 200 times/day, app data synchronized manually (once/day), Bluetooth calls (15 minutes/week), exercise (90 minutes/week on average with GNSS turned on); 36 days: Power saving mode usage scenarios, paired use of HONOR phone and watch, continuous heart rate monitoring disabled (smart mode), automatic stress detection, automatic SpO2 measurement, and healthy sleep, message notifications (100 messages, 1 call, 1 alarm/day), screen turned on 20 times/day. The device meets the 5ATM protection class requirements of ISO 22810:2010 and can withstand pressure equivalent to a depth of 50 meters of static water for 10 minutes, not an actual water resistance capability of 50 meters. It can be used in shallow water activities such as swimming pools or sea swimming. It is not suitable for underwater diving, snorkeling, hot showers, saunas, hot springs, and other activities in deep water or involving high-speed water flows. After use in seawater, it is recommended to rinse slowly with water and dry. This device complies with the IP68 water resistance rating, but its water resistance is not permanent, and protection may decrease due to daily wear and tear. The watch requires OTA upgrade support. Data comes from HONOR lab. The maximum brightness is 1500 nits. Screen brightness may vary depending on the lighting environment and specific display content. This product is not a medical device but is intended for health management. Measured data and results are for reference only and do not constitute a basis for diagnosis or treatment. Watch faces may vary in actual appearance in different regions and countries, and HONOR will also adjust and update watch faces from time to time. The watch face images displayed for the product are for reference only, please refer to the actual products. This product is not a medical device but is intended for health management. Measured data and results are for reference only and do not constitute a basis for diagnosis or treatment. The blood oxygen (SpO2) feature is not available in the markets of Chinese Taiwan, Japan, and South Korea. Night HRV displays only the average HRV value during sleep. This product Color: Black Condition: New