RUN TO STAY IN SHAPE Simple to use and equipped with the essential functions, the PC 25.10 is an ECG accurate digitally coded heart rate monitor. With a modern sporty design, the PC 25.10 is an ideal training tool to help you reach your fitness goals. The PC 25.10 has 1 training zone with an audible zone alarm. Multiple memory functions allow the user to view training totals by the week up to 12 weeks, month up to 12 months or since reset. With an illuminated display and waterproof design, weather or darkness wont slow you down.