Designed to resist mechanical stress, shock and vibration. G-Shock is an abbreviation for Gravitational Shock. The watches in the G-Shock line are designed primarily for sports and outdoors-oriented activities; nearly all G-Shocks are chronographs, with either a digital display or a combination of analogue and digital. Other features available in most of the watches watch are countdown timer, world clock, alarms, electroluminescent backlight and water resistance. Newer high-end models in the line also feature GPS, compass or radio-controlled adjustment known as multi-Band.