The function of the small dial is to calculate the average speed, set the distance, and use it with x above the dial after timing.

Other key functions:

The circle on the left is mainly functional indication, such as snz is an intermittent alarm clock, sig is an hourly alarm, a.light is an automatic lighting indication, and al should be an alarm clock. The middle circle is a speedometer, which can measure some speeds and distances with the circle on the right.

the g-shock at the top of the dial is a trademark, the protection at the bottom is protection, the reverse at the top right is backward, the forward at the bottom right is forward, the adjustment at the top left is adjustment, and the mode at the bottom left is mode. Many Casio watch buttons are like this.

Extended information:

Casio G-SHOCK is a Casio model, which has the proud characteristics of being tough, durable and waterproof. SHOCK means to strike shock, which means shock in medicine. The front g stands for gravity.

functional structure

hollow case construction

The movement is suspended in the dial, and only a few connection points are connected with the shell chain, so as to relieve the impact and realize the shock prevention of the movement.

all-directional guard structure

The watch has a prominent outer frame, which can protect the buttons and dial from direct impact when the watch falls at any angle.

shockproof strap shape

The joint between the watch and the strap is fixed in a curved shape, and the strap becomes a component to alleviate the impact. When the watch encounters a frontal impact, it can alleviate most of the impact force and bounce the watch back.

reference: Casio G-shock- Baidu Encyclopedia.