> ## Documentation Index > Fetch the complete documentation index at: https://docs.sonohealth.com/llms.txt > Use this file to discover all available pages before exploring further. # SonoHealth HeartBeats™ vs Sonoline C Fetal Doppler — Full Comparison > SonoHealth HeartBeats™ vs Sonoline C: side-by-side comparison of FDA status, probe frequency, display, warranty, price, and who each is best for. The Sonoline C is one of the most widely purchased home fetal dopplers. Here is a factual, side-by-side comparison with the SonoHealth HeartBeats™. ## Side-by-Side Comparison | Feature | SonoHealth HeartBeats™ | Sonoline C | | ----------------------- | ---------------------- | ------------------------- | | **FDA Status** | FDA-cleared ✅ | Not FDA-cleared ❌ | | **Probe Frequency** | 2.5 MHz | 3 MHz | | **Digital BPM Display** | ✅ Yes | ✅ Yes | | **Audio Speaker** | ✅ Built-in | ✅ Built-in | | **Headphone Jack** | ✅ Yes | ✅ Yes | | **Power** | 9V battery | AA batteries | | **Warranty** | 2 years | Varies by seller | | **Return Policy** | 60-day guarantee | Varies by seller | | **Brand** | US-based (SonoHealth) | Generic / various sellers | | **Price** | \$69 | \~\$30–50 | | **Where to Buy** | sonohealth.com, Amazon | Amazon, various | ## The Key Difference: FDA Clearance The most significant difference is FDA clearance. The SonoHealth HeartBeats™ has been reviewed and cleared by the FDA as a Class II medical device. The Sonoline C has not undergone FDA review and is not FDA-cleared for sale as a medical device in the United States. This matters for several reasons: * FDA clearance means the device has been evaluated for safety and substantial equivalence * Non-cleared devices may have inconsistent ultrasound output levels * FDA-cleared labeling includes appropriate safety warnings that protect users * Many healthcare providers specifically recommend FDA-cleared devices ## Probe Frequency: 2.5 MHz vs 3 MHz The Sonoline C uses a 3 MHz probe. The HeartBeats™ uses 2.5 MHz. Both are in the appropriate range for home fetal heart detection, with the following practical differences: * **2.5 MHz** has slightly deeper tissue penetration, which can be beneficial for users with higher BMI * **3 MHz** has slightly higher resolution at shallow depths, which may benefit very lean users in early pregnancy * In practice, both frequencies work well for the majority of users in the second trimester onward ## Price Difference The Sonoline C is less expensive ($30–50 vs $69 for the HeartBeats™). The HeartBeats™ commands a higher price due to FDA clearance, a 2-year warranty, 60-day return policy, and US-based brand support. For some parents, the lower price of the Sonoline C is the deciding factor. For others, the peace of mind from an FDA-cleared device with a real warranty is worth the premium. ## Who Each Is Best For **SonoHealth HeartBeats™ is best for:** * Parents who want FDA-cleared reassurance * Anyone who values a warranty and return policy * Users who want US-based customer support * Those with higher BMI (2.5 MHz penetrates deeper) **Sonoline C may be preferred by:** * Parents primarily motivated by price * Those who already own one and are comfortable with it * International buyers where FDA status is less relevant ## The Bottom Line If FDA clearance, warranty coverage, and brand accountability matter to you, the SonoHealth HeartBeats™ is the better choice. If budget is the primary concern and you understand the trade-offs, the Sonoline C is a widely used option. FDA-Cleared · 2.5 MHz · 2-Year Warranty · \$69