Features

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Camera and Display Features
Display Resolution 240x180 pixels  172x172 Pixels  454 x 454 Pixels  360 x 360 Pixels
Display Size 1.25 inch  1.27 inch  1.77 inch  1.33 inch
Display Type OLED  LCD  Super AMOLED
Backlight Display Yes Yes Yes
Scratch Resistant Yes Yes Yes
Other Display Features Always-on Transflective Color Display, Scratch Resistant View More... Always-on Color Display with Scratch Resistant Gorilla Gl View More...
Fitness and Watch Functions
Calorie Count Yes Yes Yes Yes
Step Count Yes Yes Yes Yes
Heart Rate Monitor Yes Yes Yes Yes
Other Fitness Features VO2MAX (Measure Fitness Level, Training Effect, Recovery View More... Tracks: Distance, Pace, Steps, Sleep Quality, Calories Bu View More...
Date & Time Display Date & Time  Yes Yes Yes
Compass Yes
Calendar Yes Yes Yes Yes
Alarm Clock Yes Yes Yes Yes
Language English  English  English
Number of Buttons 3  3  2
Other Watch Functions Get Emails, Text Messages, Incoming Calls and Other App /View More... Personalize Dial, Control Music, Calendar Alerts, Social View More... Customizable Watch Faces, Calendar Alerts, Receive Notifi View More...
Dimensions
Weight 70 g  63 g
Width 43 mm 
Warranty
Warranty Summary 1 Year Manufacturer's Domestic Warranty  1 Year Warranty  2 Years Warranty  1 Year Warranty
Warranty Service Type For Any Issues Regarding the Product Please Contact: 1800View More... Carry In  Carry In
Covered in Warranty 1 Year Manufacturer Warranty from the Date of Purchase  Manufacturing Defects  Manufacturing Defects  Manufacturing Defects
Not Covered in Warranty Physical Damage  Physical Damage  Physical Damage
Domestic Warranty 1 Year  1 Year  2 Year  1 Year
International Warranty 1 Year
Audio and Video Features
Microphone Yes
Voice Control Yes
General
Sales Package Smartwatch, User Manual, Charger, Dongle  Smartwatch, Charging Cable, User Manual  Smartwatch, Charger, User Manual  Smartwatch, Charging Dock, Travel Adapter, Strap, Quick S View More...
Model Number FB502SBKL  A1619  FTW4011  SM-R800NZSAINU
Model Name Blaze  Amazfit Stratos  4th Gen Explorist HR  Galaxy Watch 46 mm
Dial Shape Square  Rectangle  Circle  Circle
Strap Color Black  Black  Silver  Black
Strap Material Elastomer  Silicone  Stainless steel  Elastomer
Size Large  Free Size  Regular  Regular
Touchscreen Yes Yes Yes Yes
Water Resistant Yes Yes Yes Yes
Usage Fitness & Outdoor  Fitness & Outdoor  Fitness & Outdoor  Fitness & Outdoor
Ideal For Unisex  Unisex  Men  Men
Dial Color Black  Black 
Water Resistance Depth 10000 mm  50 m  30 m  50 m
Dial Material Metal Case 
Product Details
Closure Metal Clasp  Strap Buckle  Metal Clasp  Strap Buckle
Sensor 3-axis accelerometer, 3-axis gyroscope, Optical heart ratView More... Heart Rate Sensor  Accelerometer, Ambient Light, Gyroscope, Heart Rate  3-axis Accelerometer, Ggyro, Barometer, Heart Rate Sensor View More...
Compatible Device iPhone, Android Smartphones  iPhone, Android Smartphones  iPhone, Android Smartphones
Notification Calendar Reminder, Call Notification, Text Notification  Yes Yes Yes
Notification Type Vibration  Vibration  Vibration
Battery Type Lithium Polymer  Lithium Polymer  Lithium Polymer
Battery Life Upto 5 Days  Upto 11 Days (Based on Usage)  Upto 24 hrs (Based on Usage)  Upto 3 Days (Based on Usage)
Rechargeable Battery Yes Yes Yes Yes
Charger Type USB Cable  AC Adapter and USB Cable  WPC Based Wireless Charging
Other Features Track Steps, Distance, Calories Burned, Floors Climbed anView More... Exchangeable Durable Watch Strap, 290 mAh Li-Polymer BattView More... Interchangeable Watch Band  22 mm Interchangeable Strap, 472 mAh Battery, US Military View More...
Charge Time 120 min  2 hrs 
Stand By Time 120 hr 
Platform and Storage Features
Compatible Operating System Android 4.3, iOS, Windows 7 and Above  Android & iOS  Android 4.4 and Above (Excluding Go Edition) and iOS 9.3 View More... Android & iOS
Operating System Fitbit OS  Wear OS by Google  Tizen Wearable OS
RAM 512 MB 
Processor Name Qualcomm Snapdragon Wear 2100  Exynos 9110 Dual Core Processor
Internal Memory 4 GB  4 GB
Number of Cores 2
Processor Speed 1.15 GHz
Connectivity Features
Call Function No  No  No  No
Bluetooth Yes Yes Yes Yes
Wi-Fi Yes Yes No  Yes
GPS Yes Yes Yes
Bluetooth Version v4.0  v4.0  v4.1  v4.2
Other Connectivity Features Wi-Fi (802.11b/g/n)  NFC, Wi-Fi (802.11b/g/n)
Operating Range 3 m 
Third Party App Support Yes