Compatible OS  Android 4.4 / iOS 9.0 or above   Operating Mode  Touch   Bluetooth Version  V4.0 or above   Weight  20g   Size  Adjustable length: 155-216 mm  Product size (L x W x H): 46.9 x 17.9 x 12 mm   APP  MI app    

Specification: Bluetooth Version: V4.0 · Waterproof Rating: IP67 · Android 4.4 + / IOS 7.0 · 0.42 Inch OLED Display Dialog Key Features :· Measurement Of Heart Rate Sleep Management Pedometer Calories Burned Measuring Steps Counting Distance Recording Sedentary Reminder · Unlock Phone Without Password Call/APP Message Reminder Time Alarm Clock · ADI Ultra Low-Power Acceleration Sensor + Optical Heart Rate...

Xiaomi Mi Band 4 Black   Description; 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. One Of The Things That Set The Mi Band 4 Apart From Many Other Feature-Laden Smartwatches Available Is Its 5ATM Water Resistant Rating -...

  Specification: Bluetooth Version: V4.0 · Waterproof Rating: IP67 · Android 4.4 + / IOS 7.0 · 0.42 Inch OLED Display Dialog Key Features :· Measurement Of Heart Rate Sleep Management Pedometer Calories Burned Measuring Steps Counting Distance Recording Sedentary Reminder · Unlock Phone Without Password Call/APP Message Reminder Time Alarm Clock · ADI Ultra Low-Power Acceleration Sensor + Optical Heart...