USED With a 1.47-inch AMOLED color screen with ultra-high brightness up to 3000 nits, a luxurious titanium alloy case and sapphire glass, and an legendary battery life of up to 21 days. HUAWEI TruSense System: Offers faster and more accurate monitoring of heart rate and blood oxygen saturation (SpO2). ECG: Ability to perform electrocardiogram directly from the wrist. Mental Health: Track emotional state and manage stress with interactive breathing exercises. Condition: Used