Xiaomi

0.95 inch AMOLED colour display
5 ATM, waterproof up to 50 m
Bluetooth 5.0

Full-colour AMOLED touch screen: the full-colour AMOLED touch screen is 39.9% bigger and brighter than ever; for a wider and more colourful view directly on your wrist; a beautiful change.
Larger reading touch screen: The Xiaomi Mi Band 4 has a large AMOLED screen (0.95 inches) with 120 / 240 pixels. You will instantly see calls, text messages, app notifications and see which music is playing. It not only alerts you through vibration on the wrist when your phone receives direct calls, messages or other notifications, but also shows the details, such as the content, directly on the screen.
24/7 heart rate monitoring: Accurately reads heart rate changes 24 hours a day and detects the current heart rate at any time. Alerts you when your heart rate is too high and protects your health at all times.

· 0. 78 inch (1.98 cm) full OLED touch display
Up to 20 TE battery life (110 mAh)
Display of the battery level, heart rate monitor, pedometer, calorie counter, distance, date/time and sleep analysis

【AMOLED Color Screen Display】 0.95 inch high-resolution AMOLED screen, 24-bit color, with a range of up to 100%, offers more brightness and is 39.9% bigger, the content displayed is brighter and more beautiful.
【FEATURES WITH 5ATM WATER RESISTANCE】The Xiaomi Mi Band 4 Smart Bracelet has a 5ATM Water Resistance Index, which responds to all your daily routines, you don’t have to worry when showering. Wash, run in the rain, swim and surf, recognize 5 different swimming styles, record 12 sets of data including swimming rhythm and number of strokes
【Heart Rate Monitor 24 Hours 7 Days】 The HRM heart rate monitor function will give you a real-time evaluation, we will inform you of your heart rate at any time and anywhere. Control your heart rate at any time, every day. Heart rate recording will start automatically once you use it