Wear your G-Shock and your mechanical watch at the same time

Wear your G-Shock and your mechanical watch at the same time

97 connected G-Shock models work with Smartlet One through a band adapter, from the G-SQUAD to the G-LIDE. Your mechanical watch on top, the G-Shock underneath, on one strap. Fully reversible.
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G-Shock compatibility

Wear your G-Shock and your mechanical watch at the same time

In short 97 connected G-Shock models work with Smartlet One through a band adapter, from the G-SQUAD to the G-LIDE. Your mechanical watch on top, the G-Shock underneath, on one strap. Fully reversible.

The connected G-Shock lines add heart rate, step counting and phone notifications to the most durable case in the industry. Smartlet One positions your G-Shock underneath the wrist, with your mechanical watch on top.

Wear yours How it works
The problem
Choosing between health data and horological heritage every morning.
The solution
Smartlet One replaces your mechanical watch strap and positions your connected G-Shock on the same wrist, underneath, through a band adapter. Wear both simultaneously.
Models
G-SQUAD - G-LIDE - Move
Lug width
Adapter included
Sensors
Heart rate +
Reversible
In seconds
How it works

See how it snaps on

Fits your Wear Your G-Shock and Your Mechanical Watch at the Same Time — adapter includedWear yours →

Choose your edition

One mechanism. Three personalities.

Every Smartlet One includes the dedicated adapter for your wearable. Pick the finish that matches your style.

Smartlet One - Shadow - Smartlet

For the explorer

Smartlet One - Shadow

€399,00

5.0 (21)

Stealth. Switch in seconds, leave no trace.

  • Material SS316L steel, black PVD
  • Weight ~100g
  • Compatible with Rolex, Omega, Seiko + 100 more
Buy now
Compatibility

G-Shock models supported

G-Shock G-SQUAD - G-LIDE - Move
Compatible
Connected G-Shock models from the G-SQUAD, G-LIDE and Move lines work with Smartlet through a band adapter: most of them end in a resin band fitted to the case rather than standard lugs. The Pro Trek Smart is not compatible.
All G-Shock sensors remain fully operational

Smartlet positions your wearable with full skin contact maintained at all times. Health data accuracy is unaffected.

Heart rateGPSStep counterBarometerCompass
Frequently paired

Mechanical watches worn with G-Shock

The most common combinations our customers wear. Find your mechanical watch and discover the right Smartlet edition.

Rolex
Rolex Cosmograph Daytona·Rolex Datejust 41·Rolex Explorer·Rolex GMT-Master II
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm
Omega
Omega Aqua Terra·Omega Constellation Co-Axial·Omega De Ville Tresor·Omega Seamaster 300M
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 24.0mm
Tudor
Tudor Black Bay 41·Tudor Pelagos 42·Tudor Ranger·Tudor Monarch
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mm
TAG Heuer
TAG Heuer Aquaracer Professional 300·TAG Heuer Carrera Chronograph 42·TAG Heuer Formula 1·TAG Heuer Monaco
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm
Seiko
Seiko Presage·Seiko Prospex SPB143·Seiko SKX Diver·Seiko Seiko 5
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mm
Breitling
Breitling Avenger·Breitling Navitimer B01 43·Breitling Superocean Automatic
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 23.0mm / 24.0mm
IWC
IWC Big Pilot·IWC Portugieser Automatic 40
18.0mm / 19.0mm / 20.0mm / 21.0mm / 22.0mm / 24.0mm
View all brands
27 brands covered
Also compatible

Other smartwatches

Smartlet works with all major smartwatches via dedicated adapters or native lug widths.

Apple Watch
Samsung Galaxy Watch
Garmin Forerunner
Polar Vantage
Google Pixel Watch
Huawei Watch GT
Fitbit Charge
Fitbit Air
Whoop
Garmin Venu
Withings Scanwatch
Coros
Suunto
Panther Eclipse
Amazfit
View all
Smartwatch compatibility guide

Step by step

Replace your strap
01

Replace your strap

Smartlet replaces your mechanical watch strap via the standard spring-bar system. Classic, Shadow, or Titanium. No tools required.

Connect your wearable
02

Connect your wearable

Smartlet uses a dedicated adapter or native lug pins depending on your smartwatch. The connector snaps onto the Smartlet module. Zero modification to the mechanical watch.

Wear both simultaneously
03

Wear both simultaneously

Both watches sit on the same wrist. All smartwatch sensors maintain direct skin contact and operate normally.

Questions

Frequently asked questions

  • Can I wear a connected G-Shock and a mechanical watch at the same time?
    Yes, with a band adapter. Smartlet One holds your mechanical watch on top of the wrist and your G-Shock underneath, on one strap. Most connected G-Shock models end in a resin band fitted to the case, so an adapter is needed before the strap.
  • Which G-Shock models are compatible with Smartlet?
    97 connected G-Shock models in our base, from the G-SQUAD (GBD-100, GBD-200, GBD-800, GBD-H1000, DW-H5600, GBA-900), G-LIDE and Move lines, each with a band adapter. The Pro Trek Smart is not compatible. G-Shock models that are not connected are covered by our watch base, not by this guide.
  • Do G-Shock sensors still work with Smartlet?
    Yes. The G-Shock sits underneath the wrist with full skin contact, so heart rate and step counting keep working as usual on the models that have them.
  • Does Smartlet damage or modify my mechanical watch?
    No. Smartlet replaces your standard watch strap using the existing spring-bar system. It makes no permanent modification to the watch case, lugs, or dial. The process is fully reversible in seconds. Your mechanical watch is unaffected and can be worn independently at any time by reinstalling its original strap. Smartlet is engineered to watchmaker tolerances and tested with the same care that goes into the watches it pairs with.