Sigma PC25.10 heart rate monitor. 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 won't slow you down. 4 heart rate functions. Digitally coded transmission. 6 time functions, including countdown and alarm. Training with 1 programmable HR zone (Fat Burning, Fitness or Individual). Calorie counter. Total values per week, month, since reset. Memory for 1 training session. Intuitive menu navigation. Simple battery change by the user. Storage of pre-set values during a battery change. Illuminated display. Watertight. Personalization using "my name". 5 languages. Stopwatch.