With rugged and stylish 1.45" stainless steel cases, the clocks both offer 24 hour markings and feature push-button electro-luminescent backlight dials and LumiNova hands for easy nighttime viewing. Shockresistant and water resistant to 3 ATM, with a 3 year button cell battery to display accurate time in all riding conditions. The matching thermometers are oil filled and offer total vibration and water resistance with a large, easy reading numbers on a 1.22" face. Super accurate temperature readings from -20 to 120 degrees Fahrenheit. Mountable anywhere with the included screws and standard post-style bracket. 1.45" case, 1.22" face.