Wear a smartwatch with your Cartier Santos | Smartlet

Yes. The Cartier Santos de Cartier Large uses a 19mm / 20mm / 23mm / 24mm lug width and is fully compatible with Smartlet. Smartlet replaces the standard strap via the spring-bar system and positions your smartwatch on the same wrist. The Cartier Santos de Cartier Large requires no modification, no drilling, and no adhesive. The setup is fully reversible in seconds and your Cartier can be worn independently at any time by reinstalling its original strap.

No. Smartlet makes no contact with the Cartier Santos de Cartier Large case, bezel, or crystal. It replaces the strap only, using the existing spring-bar slots. The module is manufactured in 316L stainless steel or titanium with polished and brushed finishing, and all contact points are non-abrasive. Your Cartier Santos de Cartier Large is protected throughout. The system is fully reversible and leaves no trace.

Smartlet is compatible with Apple Watch (all series), Samsung Galaxy Watch (4, 5, 6, 7), Garmin Fenix (6, 7, 8), Garmin Forerunner, Garmin Venu, Google Pixel Watch, Polar Vantage, Fitbit Charge, Huawei Watch GT, Withings ScanWatch, Coros, Suunto, and Whoop. The Cartier Santos de Cartier Large with its 19mm / 20mm / 23mm / 24mm lug width is compatible with the full Smartlet range. All smartwatch sensors remain operational when worn via Smartlet.

Smartlet is available directly at smartlet.io in three finishes: Classic (316L stainless steel), Shadow (PVD black-coated 316L), and Titanium. All three finishes are compatible with the Cartier Santos de Cartier Large and work with its 19mm / 20mm / 23mm / 24mm lug width. Orders ship internationally from Europe. No additional accessory is required for standard lug widths between 18mm and 24mm.