2021 price lock icon

We’ve locked down selected products to 2021’s lowest price for your business. And they’re guaranteed not to rise for 30days!*

*Selected top tech guaranteed to match or be lower than last year’s lowest price. Our price lock means selected prices will not increase during a 30 day promotion period. There are three promotion periods planned, period 1 - 20/07/22 - 18/08/22, period 2 - 19/08/22 - 17/09/22 and period 3 18/09/22 - 17/10/22. Promotion subject to product availability, Currys reserves the right to cancel the promotion at any time.

FITBIT Sense 2 Smart Watch - Shadow Grey & Graphite

N581368W | 291833

Free delivery

Next Day delivery available

  • Tracks sports / steps / distance / calories / sleep
  • Monitors heart rate with ECG / blood oxygen / stress
  • Battery life: 6 days +
  • Waterproof (IP67)
  • GPS
  • 2 year guarantee
Business Price Promise

Buy from us safe in the knowledge you’ve paid a great price.

If you find Argos, John Lewis, AO.com or eBuyer.com has the same product at a cheaper price, including voucher offers, we’ll match it – even up to 14 days after purchase.

Learn more

Range options

Product information

The Fitbit Sense 2 makes your health and wellbeing top priority – just as it should be. It's got handy tools for helping you learn how to manage stress, sleep better, and live healthier. All-day body-response tracking and reminders to check in can help you identify patterns of stress. Find some zen with guided breathing, exercise, meditations and more. With a daily sleep score, you'll be able to tell how well you're resting too, which means you can improve your health from all angles.

Good to know

- Tune into your body with metrics for heart rate variability, skin temperature variation, SpO2 and more
- Keep a close eye on your heart rate with the ECG app – you'll get a notification if it's too high or low
- Check if you're ready for a workout or a recovery day with the Daily Readiness Score
- There are over 40 exercise modes, including strength training, golf, and kayaking
- You can use your favourite Google apps like Google Maps and Google Wallet
6+ days of battery will see you through most of the week – get another day's worth with a quick 12 minute charge
Amazon Alexa is built-in, so you can ask questions, set alarms, check the weather, and more

Please note: Google apps are coming soon.

FITBIT Sense 2 Smart Watch - Shadow Grey & Graphite, Tracks sports / steps / distance / calories / sleep, Monitors heart rate with ECG / blood oxygen / stress, Battery life: 6 days +, Waterproof (IP67), GPS, 2 year guarantee


Basic Specifications

Manufacturer's Part Number
Smart watch


- Face: Black
- Bezel: Graphite Aluminium
- Strap: Shadow Grey
Box contents
- Fitbit Sense 2 Smart Watch (FB521BKGB)
- Classic band (S/L)
- Charging cable
12.3 x 40.5 x 40.5 mm (H x W x D)
37.64 g
Manufacturer’s guarantee
2 years


Rounded square
AMOLED always-on display


- Bluetooth


Health & fitness tracking
- Steps
- Distance
- Calories
- Heart rate
- Sleep
- Running
- Swimming
- Menstrual cycle (via app)
Smart functions
- Smartphone notifications
- Fitbit Pay
- Spotify
Voice assistant
Amazon Alexa
Water resistant (IP67)
- Accelerometer
- Electrocardiogram (ECG / EKG)
- spO2
- Pedometer
- Heart rate monitor
- Skin temperature


Smart watch
App store
Fitbit app
- iOS
- Android
Size / fit
- Small (fits wrist 129
- 175 mm in circumference)
- Large (fits wrist 158
- 209 mm in circumference)
Strap material


Battery type
Battery life
- 6 days +
- With GPS: Up to 5 hours
Charging method
- Magnetic charging dock
Charge time
Up to 2 hours
Quick charge
Up to 1 day battery from 12 minutes charging
Delivery FAQs

Next Day delivery

Next day delivery available for small items directly from our warehouse as identified on our listings page and ordered before 15:00. Postcode restrictions may apply. For full terms and conditions please visit T&Cs.


Standard delivery is free on small items over £40 ex VAT. Large items (large kitchen appliances and some TVs over 40") do not qualify for standard delivery. There are a variety of free and chargeable delivery options for these items detailed during the checkout process.

How long does delivery take?

Products will be sent as soon as possible, but may be delayed due to supply chain pressures. Predicted lead time for your chosen product/s will be detailed in your basket before checkout.
For large items (kitchen appliances, large screen TVs etc.) you can select your delivery date and time during the checkout process.

Installation and recycling information

Installation and recycling are available on large items (large kitchen appliances and TVs over 40”) and can be selected during the checkout process.
If you have selected recycling, please ensure your existing appliance is disconnected (and defrosted where relevant) before our team arrive.
Where installation has been purchased, our team will disconnect your existing appliance, install your new product and connect it to existing services within 1 meter.

Please note: Installations are only available to domestic premises. Our installers are not authorised to install any products within any commercial location

Price Match

We'll match against any other UK retailer store or website price including offer-code discounts.

How to request a business price match
We promise to match the competitor’s price available when you contact us. To request a price match for:

  • Online purchases: Contact us here.
  • In store purchases: Contact us here.

Information you’ll need
If you have already purchased you’ll need your receipt, the competitor you want us to match and details of any relevant voucher offers.
If you have not yet purchased you’ll need; the product code (available on the product page), our price, the competitor you want us to match and details of any relevant voucher offers.

We’ll even price match 7 days after your purchase!
Here’s how to get a price match if you’ve already bought:
If you see the same item cheaper elsewhere, within 7 days of buying from us we’ll refund you the difference.
If you bought online: call us on 0344 561 6789 and have your receipt handy.

Price Promise terms & conditions
We'll match against any other UK retailer store or website price including offer-code discounts. We’ll match the prices of any products (not delivery, installation charges, product protection plans or other services) offered on identical terms and where we can check the price and stock position. Our competitor’s product must be the same model number as ours. Both us and the competitor must have the product in stock and ready for delivery. We do not match competitor’s ink prices, trade, membership & 3rd party market place sellers.

Limited to maximum five units per order or transaction. Cannot be used with any other offer.