1、　ECG accurate heart rate detection
2、　Battery changeable(Lithium battery CR2032)
3、　Easy installation
4、　Compatible with most market brand Heart Rate Monitors & Receivers.(example: POLAR，SUUNTO，OREGON，SIGMA …..e.t.c.)
5、　Compatible with most market brand treadmill, rowing machine, indoor exercise bike………..e.t.c. Receivers.