Features

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Camera and Display Features
Display Resolution 240 x 180 Pixels  300 x 300 Pixel  454 x 454 Pixels  360 x 360 Pixels
Display Size 1.25 inch  1 inch  1.77 inch  1.33 inch
Display Type LCD  Super AMOLED
Backlight Display Yes Yes Yes Yes
Scratch Resistant Yes Yes
Other Display Features 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 Sleep Monitoring  Track Steps, Distance, Heart Rate 24/7, Cardio Fitness LeView More... Tracks: Distance, Pace, Steps, Sleep Quality, Calories Bu View More...
Date & Time Display Yes Yes Yes Yes
Calendar Yes Yes Yes Yes
Alarm Clock Yes Yes Yes Yes
Language English  English
Number of Buttons 3  1  3  2
Other Watch Functions Customisable Watch Faces, Smart Notification  Personalize Dial, Control Music, Calendar Alerts, Social View More... Customizable Watch Faces, Calendar Alerts, Receive Notifi View More...
Altimeter Yes
Dimensions
Weight 303.3 g  40 g  63 g
Warranty
Warranty Summary 1 Year Warranty  1 Year Warranty Provided by the Manufacturer from Date ofView More... 2 Years Warranty  1 Year Warranty
Warranty Service Type Carry In  Carry In  Carry In  Carry In
Covered in Warranty Manufacturing Defects  Manufacturing Defects  Manufacturing Defects  Manufacturing Defects
Not Covered in Warranty Physical Damage  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, Charger, User Manual  Smartwatch, Charging Cable, User Manual  Smartwatch, Charger, User Manual  Smartwatch, Charging Dock, Travel Adapter, Strap, Quick S View More...
Model Number FB503GYBK  FB415SRGY  FTW4011  SM-R800NZSAINU
Model Name Ionic  Versa Lite Edition  4th Gen Explorist HR  Galaxy Watch 46 mm
Dial Shape Square  Square  Circle  Circle
Strap Color Black  Grey  Silver  Black
Strap Material Elastomer  Silicone  Stainless steel  Elastomer
Size Regular  Regular  Regular  Regular
Touchscreen Yes Yes Yes Yes
Water Resistant Yes Yes Yes Yes
Usage Notifier, Fitness & Outdoor  Fitness & Outdoor  Fitness & Outdoor  Fitness & Outdoor
Ideal For Unisex  Unisex  Men  Men
Dial Color Black 
Water Resistance Depth 50 m  50 m  30 m  50 m
Product Details
Closure Strap Buckle  Metal Clasp  Strap Buckle
Sensor 3-axis Accelerometer, 3-axis Gyroscope, Optical Heart RatView More... 3-axis Accelerometer, Optical Heart Rate Sensor, RelativeView More... 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  iPhone, Android Smartphones
Notification Yes Yes Yes Yes
Notification Type Text and Calender Alerts  Vibration  Vibration
Battery Type Lithium Polymer  Lithium Ion  Lithium Polymer
Battery Life Upto 6 Days (Based on Usage)  Upto 4 Days (Based on Usage)  Upto 24 hrs (Based on Usage)  Upto 3 Days (Based on Usage)
Rechargeable Battery Yes Yes Yes Yes
Charger Type Charging Cable  WPC Based Wireless Charging
Other Features Wireless Syncing  Connected GPS, Reminders to Move, Silent Alarm, Text and View More... Interchangeable Watch Band  22 mm Interchangeable Strap, 472 mAh Battery, US Military View More...
Maximum Operating Altitude 9144 m 
Charge Time 120 min  2 hrs  2 hrs 
Platform and Storage Features
Compatible Operating System Android & iOS  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 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)
Messaging Support No 
Call Features Incoming Call Alerts 
Email Support Yes
Third Party App Support Yes Yes