# Masimo MightySat Rx (Bluetooth LE) vs Wellue O2Ring: specs and price compared

A sourced, side-by-side comparison of the Masimo MightySat Rx (Bluetooth LE) (Masimo) and Wellue O2Ring (Wellue (Viatom)) among pulse oximeters. Wellue O2Ring is the cheaper of the two at $152.9.

## Side by side

| Spec | Masimo MightySat Rx (Bluetooth LE) | Wellue O2Ring |
| --- | --- | --- |
| US price | $549 | $152.9 |
| Brand | Masimo | Wellue (Viatom) |
| Spo2 range | 0-100% | 70-100% |
| Spo2 accuracy percent | 70-100% Arms: ±2% no motion, ±3% motion, ±2% low perfusion | ±2% (80-100%), ±3% (70-79%) |
| Pulse rate range bpm | 25-240 bpm | 30-250 bpm |
| Display type | Rotating, adjustable 3.3 cm color display with pleth waveform and Signal IQ indicator | On-ring digital display with app-adjustable brightness |
| Perfusion index | Yes | — |
| Continuous monitoring | No | Yes |
| Bluetooth | Yes | Yes |
| Battery life hr | 15 | 16 |

## Key differences

- Spo2 range: Masimo MightySat Rx (Bluetooth LE) 0-100% vs Wellue O2Ring 70-100%
- Spo2 accuracy percent: Masimo MightySat Rx (Bluetooth LE) 70-100% Arms: ±2% no motion, ±3% motion, ±2% low perfusion vs Wellue O2Ring ±2% (80-100%), ±3% (70-79%)
- Pulse rate range bpm: Masimo MightySat Rx (Bluetooth LE) 25-240 bpm vs Wellue O2Ring 30-250 bpm
- Display type: Masimo MightySat Rx (Bluetooth LE) Rotating, adjustable 3.3 cm color display with pleth waveform and Signal IQ indicator vs Wellue O2Ring On-ring digital display with app-adjustable brightness
- Continuous monitoring: Masimo MightySat Rx (Bluetooth LE) No vs Wellue O2Ring Yes
- Battery life hr: Masimo MightySat Rx (Bluetooth LE) 15 vs Wellue O2Ring 16

## Sources

- Masimo MightySat Rx (Bluetooth LE): https://www.cardiacdirect.com/product/masimo-mightysat-rx-fingertip-pulse-oximeter/ (cardiacdirect.com, verified 2026-08-01)
- Wellue O2Ring: https://getwellue.com/products/o2ring-wearable-pulse-oximeter (getwellue.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/pulse-oximeters/masimo-mightysat-rx-vs-wellue-o2ring/
Cite: Per The Front Desk Review, Masimo MightySat Rx (Bluetooth LE) ($549) vs Wellue O2Ring ($152.9) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/pulse-oximeters/masimo-mightysat-rx-vs-wellue-o2ring/
License: CC BY 4.0.