The built-in Smartphone Link function uses (Bluetooth®) communications to connect to a smartphone and correct the time automatically four times a day. When crossing time zones, the watch displays the local time with one push of a button. It also uses information acquired via smartphone to update the global time difference and time zone information contained in the watch’s internal data.
The GPS function enables the watch to acquire positioning and time-calibration data from GPS satellites. It analyzes the current time zone and Daylight Saving Time information and displays the correct time automatically.
Standard time radio waves are received by a tiny built-in antenna in Japan (Fukushima and Kyushu transmission stations), the United States, the UK, Germany and China, and the time is corrected automatically.
Casio's proprietary solar-charging system converts light to ample power to operate multiple power-hungry functions.
An anti-magnetic plate is arranged inside the module to provide the magnetic resistance (JIS type 1) required for daily use without interfering with radio wave reception sensitivity.
The antenna volume ratio has been reduced to about 80% without reducing its reception performance. This makes space for mounting of more parts and optimization of the circuit board layout.
Dual-coil motors capable of high-speed, high-torque watch hand operation have been downsized to about 76% their original size to permit 2 of them to be installed in the module. A total of 6 motors provide rapid mode switching and a variety of hand expressions.
Reducing the number of circuit boards and installing the antennas and battery on a single plane has made it possible to design a thinner module.
Lower power consumption by the GPS signal reception system has contributed to downsizing of the rechargeable battery, enabling further slimming of the module.