Xiaomi Redmi Watch 4 Obsidian black BHR7854GL

Diameter: 43

Thickness: 12mm

Strap Width:19
Waterproof 5ATM
Screen size 1.7″
Screen type TFT-LCD, color screen
Screen cover 1.8 High hardness glass cover
Strap material TPU hardness 65 degrees
Buckle TPU hardness 75 degrees
Tongue buckle Powder metallurgy
Hardware
MCU GR5515, BLE 5.1, 1MB FLASH + 256KB RAM
IMU (acceleration + gyroscope) STK8321
PPG heart rate sensor PD70-01C-TR7
Screen Resolution 240*280
Flash 64Mb
Bluetooth BLE5.1
Bluetooth antenna module Metal frame
Power
Operating Voltage 3.8V
Battery capacity 260mAh
Battery type Lithium polymer battery
Charging method Magneto-suction charging
Charging time ? 2.5 hours
APP OS
iOS iOS 9.0+
Android Android 4.4+
Function
Multi-language support 9 languages(China, English, German, Japanese, Spanish, Italian, French, Portuguese, Russian)
Basic functions Clock, date display (12/24 hour system, default 12 hour system)
Multi-dial OTA upgrade (Upgrade directly via the Bluetooth connection app)
Daily activity monitoring Heart rate (24-hour real-time heart rate monitoring)
Sleep (excluding short break): falling sleep time, wake up time, total sleep time.)
Steps (Monitor the number of steps per minute and record it every 10 minutes)
Calorie (Monitor calories per minute and record it every 10 minutes)
Distance (Monitor the distance per minute and record it every 10 minutes)
Sports functions Outdoors walking (Exercise time, energy consumption, heart rate, pace, speed, steps, distance)
Indoor running (Exercise time, energy consumption, heart rate, pace, speed, steps, distance)
Outdoor riding (Exercise time, energy consumption, heart rate, [ App launches the movement display: pace, speed, distance])
Indoor bicycle (Exercise time, energy expenditure, heart rate)
Outdoors running ( Exercise time, energy consumption, heart rate, pace, speed, steps, distance)
Hiking (Exercise time, energy consumption, heart rate, pace, speed, steps, distance)
Fitness (Exercise time, energy expenditure, heart rate)
Elliptical Machine ( Exercise time, energy expenditure, heart rate )
Stepper Machine ( Exercise time, energy expenditure, heart rate )
Rowing Machine ( Exercise time, energy expenditure, heart rate )
Autonomous measurement Heart rate measurement (User self-measurement, single heart rate monitoring)
Notifications Calling Notification (Incoming call received, an alert is displayed; You can hung it up by watch.)
Stand-up reminder (This reminder appears when the user is sedentary more than an hour, reminding the user to stand up and do some exercise.)
SMS notification (The phone receives SMS message push anddisplay it to watch.)
App notification (Push notifications from other apps in watch by your choice)
Alarm reminder
Target reaching reminder (Show this alert when the sport goal is reached)
Low battery reminder (Show this alert when the battery power is low)
Heart rate too high alert (Show this alert when the heart rate is too high)
Other functions Stopwatch (The stopwatch is accurate to the nearest second (eg 59:59.99))
Timer (The timer can be set up to 23 hours, 59 minutes and 59 seconds.)
Firmware information (View device related information (firmware version, Bluetooth address, etc.))
Sports record
Reset function
Music control (Control your smartphone to play music.)
Gesture Lift the wrist (Lift the wrist to automatically brighten)
lay down (Put down the automatic shut down screen)