M1 Features
 

• Wireless heart rate monitor (chest strap wirelessly transmits your heart-rate to the watch)
• Time in zone (Records how long you have been in each training zone)
• Target zone ( Set in a zone you want to work at and the M2 will show you what it takes to stay there)
• Time (can also be used as a watch)
• Alarm (a "pick up the kids" or "time for that date" alarm - nothing to do with heart-rate)
• Own code (the chest-strap is coded, so there're no interference with other nearby heart-rate monitors)
• Calories ( has a calorie counter and also does a body mass index reading)
• Exercise diary (1 day memory )
• User changeable battery ( all suunto heart rate monitors have user changeable batteries, unlike the polar watches)
• Water resistant  (30m)
• Calender
• Languages (menu available in 9 languages- EN, DE, FR, ES, IT, FI, SV, NL, PT)