Inclined holding parts secure a wearable strap inside the housing, reducing external protrusions and preserving inner space.
A locking hinge pin joins case horns, a separate fastening element, and bracelet links to improve attachment reliability and simplify removal.
An outward-facing side sensor avoids sleeve obstruction while wear-orientation detection supports accurate illuminance readings and correct display direction.
A translucent gasket and intermediate portion guide visible and infra-red light to the solar cell, improving power supply while preserving an opaque case appearance.