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Double J
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A reliable and portable solution for listening to your baby’s heartbeat from the comfort of home or in a clinic setting. This handheld fetal Doppler ultrasound device is designed to help you detect your baby’s heart rate clearly — offering expectant parents and professionals an easy-to-use way to connect with the little one and monitor fetal well-being. As a thoughtful bonus, the package includes a free digital thermometer, adding extra value for everyday pregnancy care.
Whether you are a professional caregiver or a parent-to-be wanting occasional reassurance between prenatal visits, this monitor delivers audible heartbeat detection and instant heart rate readouts, helping you feel more connected and informed during your pregnancy journey.
If you’re looking for a simple, portable way to hear your baby’s heartbeat and keep a quick check on basic pregnancy comfort — plus get the bonus digital thermometer — this fetal Doppler is a practical, user-friendly choice. Add it to your care kit today and enjoy those early moments of bonding while staying informed.
| Category | Details |
|---|---|
| Model Number | JSL-T501 |
| Weight | Approx. 161 g (without batteries) |
| Display Type | Backlit LCD (39 mm × 31 mm) |
| Working Mode | Pulse-Wave Ultrasonic Doppler |
| Probe Type | High-Sensitivity Integrated Single Probe |
| Ultrasound Frequency | 3.0 MHz (Optional: 2.0 MHz / 2.5 MHz) |
| Detection Range (Fetal HR) | 65 – 210 bpm |
| Measurement Accuracy | ±2 bpm |
| Resolution | 1 bpm |
| Ultrasound Output Power | < 20 mW |
| Sound Pressure Level | < 0.1 MPa |
| Auto Shutdown | Yes (approx. 1 min without signal) |
| Power Supply | 2 × AA (1.5V) Batteries |
| Operating Temperature | 5°C – 40°C |
| Storage Temperature | –20°C – 55°C |
| Humidity Tolerance | ≤ 85% RH (use) / ≤ 93% RH (storage) |
| Atmospheric Pressure Range | 86 – 106 kPa |
| Dimensions | 128 × 96 × 30 mm |
1 × Portable Fetal Doppler Unit (JSL-T501)
1 × High-Sensitivity Ultrasound Probe (Attached)
1 × User Manual
2 × AA Batteries (Included)
1 x Digital Thermometer
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