# Wellue O2Ring vs Zacurate Pro Series 500DL: specs and price compared

A sourced, side-by-side comparison of the Wellue O2Ring (Wellue (Viatom)) and Zacurate Pro Series 500DL (Zacurate) among pulse oximeters. Zacurate Pro Series 500DL is the cheaper of the two at $19.99.

## Side by side

| Spec | Wellue O2Ring | Zacurate Pro Series 500DL |
| --- | --- | --- |
| US price | $152.9 | $19.99 |
| Brand | Wellue (Viatom) | Zacurate |
| 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 |

## Key differences

- 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 Yes vs Zacurate Pro Series 500DL No
- Bluetooth: Wellue O2Ring Yes vs Zacurate Pro Series 500DL No
- Battery life hr: Wellue O2Ring 16 vs Zacurate Pro Series 500DL 35

## Sources

- Wellue O2Ring: https://getwellue.com/products/o2ring-wearable-pulse-oximeter (getwellue.com, verified 2026-08-01)
- Zacurate Pro Series 500DL: https://zacurate.com/products/500dl-fingertip-pulse-oximeter-black (zacurate.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/pulse-oximeters/wellue-o2ring-vs-zacurate-pro-series-500dl/
Cite: Per The Front Desk Review, Wellue O2Ring ($152.9) vs Zacurate Pro Series 500DL ($19.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/pulse-oximeters/wellue-o2ring-vs-zacurate-pro-series-500dl/
License: CC BY 4.0.