Solar Sports Watch: as long as there is light, the clock has a power source. If there is no light works the clock with its own built in battery. The battery life can effectively improves, and also can be the of the environment.Mutifi Ktionale clock daily use: Chronograph, Stopwatch, Alarm, Calendar. Ideal for outdoor and indoor sports, such as running, climbing, etc Suitable for most men and boys.More,: The Time Display is both analog and digital and the clock face has a El Back Light Function Photo 1 is El Light Display Mode; Photo 2 normal display mode), makes the reading the time even is much easier. Rotating bezel, you can adjust the timing differences to another Bereich.5 ATM water proof: The Clock suitable for bath/shower with cold water, with cold water or washing your hands. (please do not press any buttons under the water. Avoid for the use in extreme hot or cold temperatures,)Jewellery and gift: with the watch box and a English instructions verpackt can the watch a beautiful Valentine's Day, birthday, Easter or Christmas gift.