TomTom is world famous for its in-car navigation systems, but recently the company has been getting into different types of GPS technology such as the Runner Cardio watch. With the ever growing sign of wearables being the next big thing, this is clearly a great business decision. The Runner Cardio features a large 22x25mm display that shows real-time running information (indoor and outdoor support) including your distance, time, pace, speed and calories burnt. It features five intensity zones depending on your needs - Sprint, Speed, Endure, Fat Burn and Easy. It also allows you to race your past performances to improve, achieve your set goals and see laps and interval training. The TomTom Runner Cardio also allows you to stay in your optimal heart zone thanks to its built-in heart rate monitor which has been independently tested and found to be extremely accurate compared to devices that feature electrocardiography.