Price: ₹24,999 - ₹23,999.00
(as of Nov 09, 2025 07:22:10 UTC – Details)
Batteries : 1 Lithium Polymer batteries required. (included)
Product Dimensions : 24.87 x 4.04 x 1.12 cm; 37.65 g
Date First Available : 13 September 2022
Manufacturer : Fitbit(フィットビット)
ASIN : B0B75W8FH2
Item model number : FB521BKGB-FRCJK
Country of Origin : Vietnam
Manufacturer : Fitbit(フィットビット)
Item Weight : 37.6 g
Item Dimensions LxWxH : 24.9 x 4 x 1.1 Centimeters
Net Quantity : 1.00 count
Included Components : Charging Cable, Classic Belt (Small and Large)
Generic Name : smart watch
Best Sellers Rank: #22,175 in Electronics (See Top 100 in Electronics) #489 in Smart Watches
Customer Reviews: 3.2 3.2 out of 5 stars 1,541 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
All-day body-response tracking with a newly added sensor;Sleep Profile and breakdown of time in light, deep & REM sleep to see what’s impacting your rest (Premium only)
ECG app;Blood oxygen (SpO2); Notifications for call, text and apps (Available when phone is nearby);6+ day battery life (Varies with use and other factors)
Includes 6-month Premium membership (New Premium members only. Premium included membership must be activated within 60 days of device activation. Valid payment method required. Cancel before membership ends to avoid subscription fees. T&C apply.)
Package Contents: Pack of 1 Device with 2 x Straps (Small & Large) and Charger
Connectivity Technology: Wifi; Band Material Type: Silicone; Case Material Type: Resin; Human Interface Input: Touch Screenbuttons; Clasp Type: Push Button Deployant Clasp; Item Type Name: Smart Watch
Customers say
Customers report that the watch stops working within a month and has poor battery life lasting only 1-2 days. Moreover, the features are limited to premium membership, and customers find the accuracy and step counting inaccurate. Additionally, the sync quality is highly unreliable. While some customers find the watch good, others consider it a defect, and opinions on value for money are divided between those who say it’s worth the money and those who find it not worth the cost.