1. Large colorized LCD display screen, big and clear data.
2. DSP technology , more advanced and makes measurement more accurate.
3. High quality and big power output, loud and clear sound.
4. Capacious and rechargeable battery, optional dry battery .
5. Real-time FHR and average FHR display in the same screen
6. With battery charge/power full/power shortage indication.
7. Automatically power off at set time.
8. FHR exceed alarming function.
9. Software can be upgraded and USB interface can be used to upload data(Optional).
2. DSP technology , more advanced and makes measurement more accurate.
3. High quality and big power output, loud and clear sound.
4. Capacious and rechargeable battery, optional dry battery .
5. Real-time FHR and average FHR display in the same screen
6. With battery charge/power full/power shortage indication.
7. Automatically power off at set time.
8. FHR exceed alarming function.
9. Software can be upgraded and USB interface can be used to upload data(Optional).

