B4-239 - Digital 5 Function Volt Meter - A safety must have. This 5 function unit includes an excellent digital volt meter, instantly keeping you aware of your voltage use. Other functions include a high accuracy digital readout showing the start-up/running condition of your battery, a clock, stopwatch, lap counter and ice alert thermometer. Strong backlight makes reading of display easy in all conditions. Includes Velcro tape for installation almost anywhere on any bike. Measures 11/16" x 1" x 5 1/2".