HUAWEI Band 9 with high-precision sleep monitoring. - Model Name: HUAWEI Band 9 - Color: Black - Band Material: Silicone - Display Type: Touchscreen - Features: Sleep Score function ■ Optimal sleep analysis with TrueSleep 4.0 sleep monitoring ■ Automatically adjusts the brightness of the watch face with the ambient light sensor ■ Significantly improved accuracy of heart rate and blood oxygen saturation measurement with TrueSeen 5.5 compared to previous models Thank you for viewing. It's very light and doesn't bother you while sleeping, making it ideal for sleep tracking. Free shipping Instant purchase available First come, first served Please refrain from purchasing if you are sensitive to used items.