Batteries are forbidden in shipping, so we won't send batteries.（2 AA batteries） Instructions： Fetal Heart Monitor is a hand-held obstetrical unit, which can be used in hospital, clinic and home for daily self-check by a pregnant woman. The device uses a color LCD of high resolution to display the fetal heartbeat. .It has audio output and can be connected with an earphone or recorder with audio input. Product Features： 1.Listen and record to your unborn baby's heartbeat when she is 12 weeks. 2.Record your own heartbeat and play it back to the newborn for a calming effect. 3.Can be used with or without a coupling agent. Also, water and cooking oil are also perfect for it. 4.Record the sounds as a remembrance. 5.LCD digital display with backlight. 6.High sensitivity doppler probe. 7.Unique fashionable design, easy and convenient operation. 8.High performance, clear sound quality. 9.Display work parameters and fetal heart rate value. 10. Alarming in orange when the fetal heart rate range is out of the normal range. 11.Output for headphones. Product specifications Product Name: fetal heart monitor Color：Pink, White Model: JPD-100S8 Function: Detect fetal heart Battery: 9V(not included) Probe ultrasonic working frequency: 2.5MHz Power supply mode: Continuous work (continuous work＞6H) Synthetic sensitivity: ≥90db Host net weight: 74g Host Dimension: 122.5*59*37.4mm Spatial peak pressure: ＜0.1Mpa Transducer sensitive and effective area: 2.65m Ultrasonic output power: ＜20mW Accuracy: ±2BPM Service life: 5 years