Wellue (Viatom)
Wellue O2Ring
$152.9
Best Pulse Oximeters · head-to-head
Wellue O2Ring vs Zacurate Pro Series 500DL
A sourced, side-by-side comparison. Zacurate Pro Series 500DL is cheaper at $19.99. Every spec and price links to its source.
Zacurate
Zacurate Pro Series 500DL
$19.99Cheaper
Which is better: the Wellue O2Ring or Zacurate Pro Series 500DL?
On the specs we track, they're closely matched. The Zacurate Pro Series 500DL is the cheaper at $19.99.
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Wellue O2Ring | Zacurate Pro Series 500DL |
|---|---|---|
| US price | $152.9 | $19.99 |
| Brand | Wellue (Viatom) | Zacurate |
| Released | — | — |
| Spo2 range | 70-100% | 0-100% |
| Spo2 accuracy percent | ±2% (80-100%), ±3% (70-79%) | ±2% (70-99%) |
| Pulse rate range bpm | 30-250 bpm | 25-250 bpm |
| Display type | On-ring digital display with app-adjustable brightness | LED numeric display |
| Perfusion index | — | No |
| Continuous monitoring | Yes | No |
| Bluetooth | Yes | No |
| Battery life hr | 16 | 35 |
Sources — Wellue O2Ring: getwellue.com (verified 2026-08-01). Zacurate Pro Series 500DL: zacurate.com (verified 2026-08-01).
What's the difference between the Wellue O2Ring and Zacurate Pro Series 500DL?
Where the two actually differ on the specs we track (7 of 8). Matching specs are omitted.
- Spo2 range: Wellue O2Ring 70-100% vs Zacurate Pro Series 500DL 0-100%
- Spo2 accuracy percent: Wellue O2Ring ±2% (80-100%), ±3% (70-79%) vs Zacurate Pro Series 500DL ±2% (70-99%)
- Pulse rate range bpm: Wellue O2Ring 30-250 bpm vs Zacurate Pro Series 500DL 25-250 bpm
- Display type: Wellue O2Ring On-ring digital display with app-adjustable brightness vs Zacurate Pro Series 500DL LED numeric display
- Continuous monitoring: Wellue O2Ring true vs Zacurate Pro Series 500DL false
- Bluetooth: Wellue O2Ring true vs Zacurate Pro Series 500DL false
- Battery life hr: Wellue O2Ring 16 vs Zacurate Pro Series 500DL 35