Xiaomi Smart Band 7 Xiaomi Smart Band 7 Japanese Version I myself have been using this product for about a year without any problems, including in the sauna. (This is just based on my experience and does not guarantee anything) The new 8 and 9 models are made of metal and may fall off in the sauna, and this model, which has a larger screen and battery capacity than the old 6, is, in my opinion, the best model for measuring heart rate in the sauna. The screen is covered, so there are no noticeable scratches, but please understand that this is a used item before purchasing. The band and charging cable are also included. ◆1.62-inch large screen display (AMOLED) Approximately 25% larger display area and always-on mode compared to the old version Selectable watch faces: 100+ types Resolution: 192 x 490 pixels Brightness: Up to 500 nits Anti-fingerprint coating reinforced glass ◆Fitness Features 110+ sports modes, 5 automatic detection modes Tracks calorie consumption, heart rate changes, and workout time *You can start freestyle, etc., during a sauna session to check your heart rate and time. ◆Health Tracking Features Heart rate monitoring, blood oxygen level measurement Tracking data can be viewed in graphs in the dedicated app The band vibrates and alerts when the heart rate deviates from the set value *It will notify you with a vibration if your heart rate exceeds the set value during a sauna session. Sleep measurement (deep sleep, light sleep, REM, breathing quality) ◆Incoming call notifications & social app notifications Notifications for incoming calls, LINE, SMS, X, Facebook, Instagram, etc. *If connected to your smartphone via BT, you can check the content even in the sauna. ◆Size/Specifications 46.5 x 20.7 x 12.25 mm, 13.5 g Battery capacity: 180 mAh 5 ATM water resistance Bluetooth 5.2 BLE Apps: Mi Fitness, Zepp Life #Xiaomismartband7 #Smartwatch #Black #JapaneseSupport #Running