Technology: Backlights

Full EL backlights that illuminate the display with just a tilt of the wrist by 40 degrees from the horizontal position and some sense light and dark automatically to bright LED lights

To turn the auto light switch on and off

• In the Timekeeping Mode, hold down B for about three seconds to toggle the auto light switch on (auto light switch indicator displayed) or off (auto light switch indicator not displayed).
• The auto light switch indicator is on the display in all modes while the auto light switch is switched on.
• In order to protect against running down the battery, the auto light switch turns off automatically approximately six hours after you turn it on.

Tips

• Avoid wearing your G Shock watch on the inside of your wrist if you are using the auto light switch. Doing so can cause the auto light switch to operate when it is not needed which shortens battery life.
• Illumination may not work if your watch is more than 15 degrees above or below parallel. Make sure the back of your hand is parallel to the ground.

Illumination turns off automatically after a preset period of time. To increase this period, follow this procedure:

• Sometimes illumination can take up to one second to enable after your watch is turned to face you. This is normal and is not a malfunction with your auto light switch.
• You may notice a faint clicking sound when you shake your G Shock back and forth. This is caused by the mechanical operation of the auto light switch and is not a malfunction or a problem with your watch.

Cheers! (:

Bape

History of Watches

A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in a pocket, with wristwatches being the most common type of watch used today. They evolved in the 17th century from spring powered clocks, which appeared in the 15th century. The first watches were strictly mechanical. As technology progressed, the mechanisms used to measure time have, in some cases, been replaced by use of quartz vibrations or electromagnetic pulses and are called quartz movements. The first digital electronic watch was developed in 1970.

Watches evolved from portable spring driven clocks, which first in the 15th century. Portable timepieces were made possible by the invention of the mainspring. Although some sources erroneously credit Nuremberg clockmaker Peter Henlein (or Henle or Hele) with inventing the mainspring around 1511, many references to 'clocks without weights' and two surviving examples show that spring powered clocks appeared in the 15th century. Henlein is also often credited with constructing the first pocketwatches, mostly because of a passage by Johann Cochläus in 1511