Frederique Constant Automatic with E-Strap FC-303LGR5B4 Casio G-Shock G-Steel Bluetooth Connected GSTB200-1 The remaining four models have

The remaining four models have highly polished stainless steel cases

20-second alarm lasting

valuable details: Like the flat and discus-shaped case

with a choice of a rubber or stainless steel strap

Frederique Constant Automatic with E-Strap FC-303LGR5B4 Casio G-Shock G-Steel Bluetooth Connected GSTB200-1 The remaining four models haveFrederique Constant Automatic with E Strap FC 303LGR5B4 Built by the watch industry experts that created the Horological Smartwatch, Frederique Constants 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.