Halliday G2 vs RayNeo iO
Side-by-side comparison of specs, features, and pricing
Specs updated
Which should you buy?
Bottom line: the RayNeo iO is the better buy for most people at $150 less, unless you need the brighter display.
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Buy the Halliday G2 if…
- You need the brighter 1600-nit display (vs 1300 nits)
- You want adjustable lens dimming
Buy the RayNeo iO if…
- You want to spend $150 less ($449 vs $599)
- You need longer battery life (48 hours vs 12)
- You're an iPhone user
Verdict generated from the recorded spec differences shown in the table below — when a spec is missing for either product, it is left out rather than guessed.
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Specs Comparison
Specs last verified
| Specification |  Halliday G2 $599 |  RayNeo iO $449 |
|---|---|---|
| Price | ||
| Price | $599 | $449 |
| Optics | ||
| Optics type | waveguide | waveguide |
| Dimming control | ✓ Yes | — |
| Transparency level | — | 97% transparency |
| Prescription support | ✓ Yes | ✓ Yes |
| Diopter range | Prescription lenses SPH -9.00 to +2.00, CYL -3.00 to +3.00 in 0.25 D increments; $199 lens credit covers 1.6/1.67-index lenses in full | Sold with prescription lenses from $608 (RayNeo store); range undocumented |
| Physical | ||
| Weight (g) | — | 33 |
| Foldable | ✕ No | ✕ No |
| IP rating | — | IP54 |
| Battery & power | ||
| Battery life (hours) | 12 | 48 |
| Connectivity | ||
| Connectivity | — | Bluetooth 5.4 (Apple MFi licensed) |
| Compatible devices | — | iOS, Android |
| Computing | ||
| Operating system | Halliday app: 45+ language live translation, Meeting Flow (captions, transcripts, action items), Cheatsheet teleprompter | — |
| Sensors & input | ||
| Camera | ✕ No | ✕ No |
| Microphones | 4 | 4 |
| Speakers | ✕ No | ✕ No |
| Voice control | ✓ Yes | ✓ Yes |
| AI assistant | Halliday AI ("Hey Halliday" wake word) | RayNeo AI + Gemini free; ChatGPT, Claude, DeepSeek, Kimi, Qwen via VIP ($9.99/mo) |
Buy the Halliday G2
Buy the RayNeo iO
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Halliday G2 vs RayNeo iO: FAQs
Which is cheaper: the Halliday G2 or the RayNeo iO?
The Halliday G2 costs $599 and the RayNeo iO costs $449, making the RayNeo iO $150 cheaper.
Which has the brighter display: the Halliday G2 or the RayNeo iO?
The Halliday G2 is brighter at 1600 nits (Halliday G2: 1600 nits, RayNeo iO: 1300 nits).
What is the main difference between the Halliday G2 and the RayNeo iO?
Based on recorded specs, the Halliday G2 leads on brightness (300 nits brighter) while the RayNeo iO leads on price ($150 cheaper).