Thank you for viewing! We will ship within 2-3 days after purchase or order. You can purchase without leaving a comment, so please consider it! HUAWEI Band 7, a smart band with HarmonyOS that tracks heart rate and sleep. - Model Name: HUAWEI Band 7 - Operating System: HarmonyOS - Color: Black - Functions: Heart rate monitoring, sleep tracking, exercise tracking I have used it a few times and am not currently using it, so I am selling it.