Pocket design, easy and conveniently to use
High quality loudspeaker, clear timbre, volume can be adjusted
Sound alarm function when FHR is not normal range
Two FHR modes: real-time and average FHR
Big LCD display dynamic FHR signal and battery energy
Match different battery, AA rechargeable battery and AA alkine batteries
Continuous working time≥8 hours
Rest automatically no heart rate signal, automatic switch off function
Backlight function, built-in safeguard of circuit
Audio output can connect earphones or recorder