This LED sport watch insirped watch will be your best choice. The whole ironic watch and red numbers give off energetic and powerful feeling. This is a iron samurai looks like a bracelet, cool and fashion. Description: 100% Brand New Top and bottom row LED for time and date display Color: Black with Red LED/Black with Blue LED/Sliver with Blue LED Material: Smooth Stainless Steel ,No waterproof Details : Function Buttons on the right-side: Top (hour and date display + select), Button (change mode),setting Time, Date, Year Length:220mm-230mm,about 8.5 inches-9.0 inches approx Case size (LxWxH): 43x25x12mm approx Net weight: 120g approx Power :CR2016 (x1) pre-installed, please change the batteries when the luminosity is too week. Set the time: To press the lower button will make the current setting to be blinking. Continue to press the lower button until you have the setting you want. Next, press the top button to change the information.