Cardiospor GT 1 is digital coded and has a large and easy display
Cardiosport GT 2 has al the features of GT 1 plus Colour graphic display.and Cardiozone.
Cardiosport GT 3 has all the features of GT 2 plus a programmable Recovery timer and Cardiozone.
Cardiosport GO 15 is stylish and compact Digital Coded. HI/ LOW Target Zone
Cardiosport GO 25 has all the features of GT 15 plus a 10 Hr stop watch with countdown timer
Cardiosport GO 35 has all the features of GO 25 plus a personalised calorie counter.
Cardiosport GT 5 has a powerful 100 hour chronograph with up to 99 memories