Ecsem Wireless 15-Function Bike/Bicycle Computer Waterproof Sport Speedometers Cycle Bicycle with LCD Speedometer with digit display & image display. Easy installation, good durability, 15 main functions. Engineering material plastics, LCD screen, electronics component. This multi-function bicycle-odometer can display all information about SPD Current Speed, ODO Meter, MXS and so on. Powered by CR2032 battery (included).