Wear your Withings ScanWatch with your mechanical watch | Smartlet
Wear your Withings ScanWatch
and your mechanical watch
at the same time
Withings ScanWatch occupies a unique position - it looks like a classic dress watch while delivering medical-grade ECG, AFib detection, SpO2, and clinically validated breathing disturbance detection. Pairing it with a Rolex or Omega used to be a redundancy. With Smartlet, both instruments coexist on the same wrist. ScanWatch 38mm models use an 18mm lug width, natively supported by Smartlet. No adapter required. All ScanWatch sensors maintain full skin contact.
How it works
Classic, Shadow, or Titanium. Match your mechanical watch case material and aesthetic. No tools required at this stage.
Attach the Smartlet adapter to your watch lugs. The spring-loaded mechanism locks in place with zero metal-to-metal case contact. Fully reversible in seconds.
Attach the Smartlet adapter to your Withings ScanWatch. It locks securely. Both watches sit on the same wrist. All sensors remain in contact with your skin.
Withings ScanWatch models supported
| Series | Smartlet compatible | Lug width | Release year | Case size |
|---|---|---|---|---|
| ScanWatch 38mm | Compatible | 18 mm | 2020 | 38mm |
| ScanWatch 42mm | Compatible | 20mm | 2020 | 42mm |
| ScanWatch 2 38mm | Compatible | 18 mm | 2022 | 38mm |
| ScanWatch 2 42mm | Compatible | 20mm | 2022 | 42mm |
| ScanWatch Light | Compatible | 18 mm | 2021 | 38mm |
| ScanWatch Nova | Compatible | 20mm | 2023 | 42mm |
Mechanical watches worn with Withings ScanWatch
Other smartwatches
Frequently asked
Can I wear a Withings ScanWatch and a mechanical watch at the same time?
Yes. Smartlet One is a modular adapter that clips onto any mechanical watch via an 18mm to 24mm adapter, allowing you to simultaneously wear your Withings ScanWatch on the same wrist. Both watches operate independently. No modification required.
Which Withings ScanWatch models are compatible with Smartlet?
All Withings ScanWatch models are compatible with Smartlet - ScanWatch, ScanWatch 2, ScanWatch Light, and ScanWatch Nova. The 42mm models (ScanWatch 42mm, ScanWatch 2 42mm, ScanWatch Nova) use 20mm lugs and are natively supported. The 38mm models (ScanWatch 38mm, ScanWatch 2 38mm, ScanWatch Light) use 18mm lugs, which are natively supported by Smartlet. No adapter required.
Will Withings ScanWatch sensors still work when attached to Smartlet?
Yes. All Withings ScanWatch sensors including ECG, SpO2, optical heart rate, and breathing disturbance detection maintain full wrist contact via Smartlet. Medical-grade ECG accuracy and AFib detection reliability are maintained.
Does Smartlet work with Withings ScanWatch Nova?
Yes. The Withings ScanWatch Nova uses a 20mm lug width and is fully compatible with Smartlet. Its hybrid dial design pairs naturally with the Smartlet aesthetic.