E-Strap Navy Stainless Steel 22mm



USD 229

Conçue et produite dans notre manufacture suisse
2 ans de garantie inclue

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Patented MMT-100 Module. Autonomy/Battery Life: 7 days. Average charging time: 4 hours. Activity Tracking, Sleep Monitoring.


Stainless Steel & glass



Navy leather, can be used on any watch with a 22mm lugwidth.


Using the supplied tool, replacing your watch’s bracelet with the Frederique Constant E-Strap is a bliss.


The health tracking features of the E-Strap are powered by a small yet powerful module hidden in the buckle, based on an ultra-low power processor. It can work seamlessly up to 7 days. It is possible to synchronize your health data with your smartphone or tablet via Bluetooth Smart. The E-Strap can be easily recharged thanks to the small provided USB charger, where the buckle can be placed on.


Unlike common silicon fitness bands, the E-Strap has a unique horological finish that preserves the authentic look of your favorite analog timepiece. The Frederique Constant E-Strap is an advanced piece of technology but it is also an elegant buckle and strap crafted under demanding watchmaking codes. When worn, the buckle merges seemlessly with the strap and becomes an extension of the watch. The E-Strap buckle is available in stainless steel, rose gold-plated and yellow gold-plated steel.


On the iOS and Android MMT-365 apps, simple and easy-to-understand graphics highlight how much one has moved and slept during the day, week, or month.

This data will assist users to better understand themselves, and along with appropriate goals setting and intelligent coaching, will improve their well-being. A better sleep pattern and a more active lifestyle are widely recognized as simple, but effective, positive behavioural changes.

The patented sensor-fusion engine tracks activity and sleep patterns with high accuracy. Activity and sleep information is presented in the MMT-365 companion application. The E-Strap will synchronize data automatically with applications on Apple and Android smartphones.

The Frederique Constant E-Strap is a patented smart buckle and strap that fits on any analog watch. Hence our slogan: Make Any Analog Watch Smart. Built by the watch industry experts that created the Horological Smartwatch, Frederique Constant’s E-Strap is a logical next step to add smart functionality to existing watches. The ultra-small buckle extension can hardly be seen, as it is thin and covered by the leather strap. The Frederique Constant E-Strap is built on the full Horological Smartwatch Platform and its sophisticated functionality.

The same MMT-365 App that accompany Horological Smartwatches is available to Frederique Constant E-Strap customers. Frederique Constant E-Straps track ACTIVITY with GET ACTIVE ALERTS as well as MONITOR SLEEP with SMART SLEEP ALARMS. Most importantly, Frederique Constant E-Straps will be available for US$/EUR/CHF 229-249, which includes a beautiful leather strap in a variety of colors. The E-Strap will be available for customers through our After Sales Service; so any analog watch sent to us will have the possibility to be fitted for an E-Strap, if the client so desires.

The new “E-Strap” is adaptable to every analog watch having a lugwidth of 20mm or 22mm. Frederique Constant and MMT SwissConnect worked together once more to adapt the same applications of the Horological Smartwatch to the E-Strap. With the help of the companion MMT-365 app, the user is able to check his or her figures at any time while simply wearing the E-Strap on any traditional Frederique Constant quartz and automatic analog watch. The module inside the buckle has an ultra low power processor, highly integrated electronics device with bluetooth capabilities, and a rechargable battery.