Original Xiaomi Mi Band 4 Smart Bracelet

Design and display
•0.95” color AMOLED display
-120 x 240 pixels
-Screen brightness up to 450 nits
-Brightness adjustment mode
•2.5D tempered glass with anti-fingerprint Coating

Battery
Standard Version: 135mAh battery capacity, up to 20 days using
NFC Version: 125mAh Battery capacity, up to 15 days suing

Water resistance
•5 ATM water resistant up to 50m

Activity tracking
•Count steps, distance, calories burned
•6 workout modes: Treadmill, exercise, outdoor running, cycling, walking, swimming

Health monitoring
•24/7 Heart rate monitoring
-Heart rate alerts
•Sleep monitoring
•Idle alerts

Sensors
•3-axis accelerometer
•3-axis gyroscope
•Capacitive proximity sensor
•Optical heart rate sensor

Connective
•Bluetooth 5.0 (Low energy)
•No NFC for standard version

System requirement
•Android 4.4, iOS 9 and above

Other features
•Stopwatch
•Alarm clock
•Timer
•Find my phone
•Phone unlock
•Event reminder
•Do not disturb mode (works even without phone)
•Lock screen
•Music controls on band