Newman Medical Model DD-300 Non-display Digital Doppler for Vascular and Fetal Monitoring (obstetrical) with Alkaline Batteries included - select one of the above probe options 

Note: display indicates battery, volume, and signal strength status - DOES NOT display heart rate

Newman Medical DD-300 Non-Display Digital Obstetric/Vascular Fetal Doppler

The Newman Medical DD-300 DigiDop is a professional-grade digital obstetric and vascular fetal Doppler delivering exceptional sound quality and clinical reliability in a durable, Made-in-the-USA design. Built for clinicians who prefer to assess fetal heart tones manually, the DD-300 features an LED indicator display showing battery status, volume level, and signal strength — without a numeric heart rate readout.

Please Note: The DD-300 does not display a numeric fetal heart rate. The display indicates only battery status, volume, and signal strength.

Replacing a Natus Doppler? View our Newman Medical–Natus Doppler Cross-Reference Chart to find your direct replacement model.

Superior Sound Quality — DSC™ Digital Sound Clarity

The DD-300 features Newman Medical's state-of-the-art Digital Sound Clarity (DSC™) technology — a built-in sound processor that enhances the sounds you want to hear while reducing background noise. The small but powerful high-fidelity speaker delivers an extraordinarily smooth, rich audio response across the full range of Doppler sounds, allowing you to hear fetal heart tones quickly and clearly.

Obstetrical Probes with XD™ Extended Depth Technology

All DigiDop obstetrical probes feature Newman Medical's exclusive eXtended Depth (XD™) technology, generating more than six times the signal at some depths compared to standard probes — without sacrificing sensitivity at greater depths. All probes are fully interchangeable across all DigiDop models for maximum versatility.

• 2 MHz Probes — Excellent deep penetration for late-term pregnancy or larger patients
• 3 MHz Probes — Especially sensitive for early fetal heart detection; suitable throughout pregnancy
• Waterproof Versions Available — Both 2 and 3 MHz probes are available in waterproof versions for water-assisted labor and delivery; easily swapped with standard probes
• Vascular Probes — A variety of vascular probes are available and interchangeable with any DigiDop

All OB probes feature a smooth contour design for comfortable handling, patient comfort, and easy cleaning. The unique magnetic probe holder securely cradles the probe without risk of cracking or breaking, and its open design resists dirt, gel, and germ buildup.

Built to Last — Industry-Leading 5-Year Warranty

The DD-300 is built with tough plastics, a stainless-steel speaker grill with micro-screen openings, and an internal sound-transparent fabric speaker cover to protect against dust and debris. Every unit and probe is individually inspected and tested at the Newman Medical facility near Denver, Colorado — a long-time center for diagnostic ultrasound manufacturing. The comprehensive bumper-to-bumper 5-year warranty covers parts, labor, the main unit, probes, and cords.

Key Features:

• DSC™ Digital Sound Clarity for superior audio performance
• XD™ Extended Depth technology for exceptional probe sensitivity
• LED display: battery status, volume, and signal strength (no numeric heart rate display)
• Fully interchangeable obstetrical and vascular probes
• 2 MHz and 3 MHz probes available; waterproof versions available
• Unique magnetic probe holder — durable, clean, and easy to use
• Industry-leading 5-year bumper-to-bumper warranty (unit, probes, and cords)
• Made in the USA — individually inspected and tested
• Operates on 3 AA alkaline or NiMH rechargeable batteries
• Dimensions: 6" x 2.5" x 1.25" | Weight: 13 oz. (with batteries)
• Battery life: up to 750 exams on alkaline / 500 exams on NiMH (1 min. each)
• Audio bandwidth: 100Hz–3,000Hz | Heart rate accuracy: ±3 BPM
• Audio cable interface: 3.5mm stereo plug
• Meets IEC60601-1, IEC60601-2, IEC60601-2-37 standards

Please select your preferred probe option above.