Ekho Heart Rate monitor watches come standard with watch face and features, heart rate monitor transmitter, and manual. The FiT8 offers Continuous heart rate, Target Zone, Out of zone visual alarm for high/low target zone, Audible alarm OFF mode, 15 laps, Back light, Time, Date, Stopwatch/Exercise time, Water Resistant, Large display, ECG Accurate, User changeable batteries, Interfaces with heart rate interactive exercise equipment.