Sundial a Solar Powered Sports Wrist Watch. The watch has a rugged sports look and feel and powered by Solar and Lithium battery making it last for long time over 2 to 3 years. The watch has multiple functions Solar Polymer Cell works in any light source plus a backup Lithium power battery inside. Dual Watch Analog and Digital LCD time keeping Stop watch lap count Day Marker Waterproof up to 100 ft TPu Band adjustable. Multi colors.