XIAOMI Band 4 Fitness Tracker Heart Rate Bluetooth Watch

Xiaomi Mi Band 4 Smart Bracelet 0.95 Inch AMOLED Color Screen Built-in Multifunction Heart Rate Monitor 5ATM Water Resistant 20 Days Standby NFC Version - Black Highlights 0.95-inch Color AMOLED Touch Screen 120 x 240 pixels, 
Screen brightness up to 450 nits, all-new user interface - smoother and simplified touch screen experience, brightness adjustment mode, 2.5D tempered glass with anti-fingerprint coating. Feature With 5ATM Water Resistant Rating One of the things that set the Mi Band 4 apart from many other feature-laden smartwatches available is its 5ATM water-resistant rating - withstands pressures equivalent to a depth of 50 meters, making it a charm when being exposed in rain, splashing, accidental submersion, showering, surface, swimming. 
Sports Details Function In the sports modes of the Misfit APP, if you turn on one of the sports modes of the treadmill, outdoor running, riding or fast walking, just lift your wrist and check the length, mileage, heart rate, speed and other data on your bracelet.
Notification Display & Reject Phone Calls While Bluetooth connecting, if there is an incoming call, it would show the caller ID. Almost notification of APPs could be synchronized to the watch. 3 Pages Message Display Support to check the latest 5 messages, If each text of message exceeds the display, touch the button can display in next page. (up to 3 pages can be displayed). 
Raise Wrist To Wake Up The Screen Raise your hand to brighten the screen without taping screen to see real-time states including sports data, time and heart rate. Count steps/Distance/Calories burned Mi Band 4 helps you record all your activities in the day, calculate the distance you walk and calories burned, take care of your health, monitor your sleep, remind you to have a rest, and track your steps, mileage and calories for high-quality sports. 24 Hours Heart Rate Monitor It tracks your heart rate continuously at every moment every day. Heart rate recording will start automatically once you wear it. Long standby time Xiaomi mi band 4 with ensures about 20 days ultra-long standby time for a full charging.
12 selling points:
1.1 "XL screen
More than 100 surfaces
Dynamic animation dial
Adjusting the dial
11 workouts
50m waterproof
24-hour heartbeat
24 hours sleep tracking / REM / nap 
Pressure detection
Breathing training
Pai activity index
Remote control photographing
Music control
Magnetic charge, no separation

• Display: 1.1 "AMOLED display.
• Battery: 125mah battery capacity, up to 21 days (charging time ~ 1 hours).
• Water resistance: 5 ATM water resistance up to 50 m.
• Activity tracking: counting steps, distance, calories consumed, female health monitor.
• Health monitoring: 24 / 7 heart rate monitoring.
• Sensor: 3-axis accelerometer, 3-axis gyroscope.
• Bluetooth level: Bluetooth 5.0.
• System requirements: Android 4.4, IOS 10 or later.
• Other functions:
• full sleep monitoring, alert wake up
• Call reminder: vibration reminder, don't miss important calls
• Sleep monitoring: monitoring sleep quality at night
• Raise your hand to light up the screen