DST= Daylight Savings Time. Many countries in the Northern Hemisphere (north of the equator) use DST in the summer time, but not all. Daylight Saving Time usually starts in March-April and ends in September-November when the countries return to standard time, or winter time as it is also known. In the Southern Hemisphere (south of the equator) the participating countries usually start the DST period in September-November and end DST in March-April. Currently one of the smallest is the AWG-100, dimensions are 52 x 46.4 x 14.9mm. One of the larger models is GSW-H1000 at 65.6 × 56.3 × 21.3 mm but new watches are released every day that could exceed these dimensions.

Solar means Powered by any light source, saving time and money as no battery change required- known as TOUGH SOLAR Can be charged by daylight on a window sill or by artificial light. A rough guide would be; Outdoor Sunlight - 5 minutes, Sunlight through window - 24 minutes, Cloudy Day through window - 48 minutes, Flourescent lights - 8 hours.