JPD-100S6 I LCD Ultrasonic Scanning Pregnant Women Fetal Stethoscope Monitoring Monitor / Fetus-voice Meter, Complies with IEC60601-1:2006, JPD-100S6 (Blue), JPD-100S6 (Pink)1. Built in loudspeaker and LCD display with backlight 2. Battery status indication 3. Output for headphone 4. Auto power off 5. High sensibility can detect the pulse of 12 week fetus. 6. Power by 1. 5V AA *2 PCS batteries 7. Fetal Heart Rate: 50 to 240 BPM(beat per minute) 8. Resolution: 1BPM 9. Accuracy: + 2BPM 10. Probe nominal frequency: 3. 0 MHz 11. working frequency: 3. 0 MHz+ 10% 12. Real time mode, Averaged mode and Manual mode 13. Complies