Spesifikasi :

• suitable for pregnant women over 16 weeks
• shell material ABS
• power 9 Volt battery
• operating temperature 5°c-40°c
• storage temperature -10°c-55°c
• rated frequency 2.0 Mhz±15%
• probe effective area 1.57 cm²±10%
• probe ultrasonic power ≤5mw/cm
• measuring ranges 50-210 bpm
• error ranges ± 2bpm
• continous working 8 hours
• ultrasonic output < 20mw