Here are introduced the main features and specifications of the F158 movement.
You can go to pages for further explanation of features from here.

Eco-Drive Satellite Wave-GPS

Receives location and time information sent from GPS satellites and adjusts the time and calendar on the watch automatically.
In addition, no periodical battery replacement is needed. This watch is fueled by light.

200 m water resistant watch for diving

This watch has 200 m water resistance and can be used for air diving with an air tank (SCUBA diving) .
(You cannot use it for saturation diving using helium gas.)
It conforms with the standard of ISO 6425: 2018.

Diving mode

It prevents wrong operation of the watch during diving; it also halts some functions such as satellite signal reception to keep the current time indicated.

Light-Level Indicator

Indicates current power generation amount.
It can be used as a reference for choosing a good charging place.

World time

Indicates the time around the world by choosing one of 38 time zones.

±5-second average monthly accuracy

Keeps high accuracy without time signal reception.

Perpetual calendar

No need for monthly and leap-year date correction until February 28, 2100.