Mi Band - HRX Edition (Black) Mi Band - HRX edition uses an OLED display so you can see more in a single glance. Simply lift your wrist to view time and tap the button for steps, distance covered and calories burnt. The improved pedometer algorithm in Mi Band - HRX edition filters out unnecessary movements. This measures steps taken and exercise more accurately. Idle alerts send a gentle buzz when you have been sitting still for too long. These reminders tell you when it's time for a short walk or a water break. MI Band - HRX edition carries your unique identity. When you are close to your Android smartphone, it unlocks your smartphone instantly - no passcodes or fingerprint required. Send notification alerts straight to the wrist so you don't miss another call, message, or notification - especially when your phone is tucked away in a bag or pocket. Rinse hands or shower with Mi Band - HRX edition without any worries. Mi Band - HRX edition is durable and resistant against water splashes, sweat, cosmetics, dust and more. The glossy black display is UV coated and resistant to scratches and fingerprints. Textured for a better touch, the anodized button has 0.05mm ripples etched across the surface, in a pattern similar to that on CDs. See more using the power-efficient OLED display. Simply tap on the button to check time and your latest stats. Note: Mi Band's phone unlocking feature requires smartphones with MIUI or Android 5.0 and above. Compatible phones: Devices with Android 4.4 and above, such as Mi 3, Mi 4, Mi 4i, Mi 5, Mi Max, Redmi Note 4G, Redmi Note Prime, Redmi 1S, Redmi 2, Redmi 2 Prime, Redmi Note 3, Redmi 3S, Redmi 3S Prime, Redmi 3S+, Mi A1, Mi Max 2 Devices with iOS 7.0 and above, such as iPhone models 4s and later. Note: Mi Band's phone unlocking feature requires smartphones with MIUI or Android 5.0 and above. Note: Product does not include heart rate monitor/ sensor.