Thank you for looking. Xiaomi Band 7, black. Items included: Main unit and charging cable. This is the last generation manufactured by Zepp, an OEM of the Amazfit brand. It can be paired and used with the Zepp app. When used with the Zepp app, you can reply to LINE messages. Please note that you cannot reply to LINE messages with the Xiaomi app. I purchased it on Mercari about six months ago and used it until a month ago. The battery lasts about a week with AOD (Always On Display) off. However, this depends on the settings, so please consider it as a reference only. The functions I used are: Step counter Sleep tracking Stress measurement Alarm (vibration) Notifications (see the above note regarding replies) *I haven't used the other functions, so their operation is unknown. It is also known as a sauna watch. I have not used it in a sauna. Thank you.