Halliday G2 vs Vuzix M400 Smart Glasses
Side-by-side comparison of specs, features, and pricing
Specs updated
Which should you buy?
Bottom line: the Halliday G2 is the better buy for most people at $900.99 less, unless you need a built-in camera.
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Buy the Halliday G2 if…
- You want to spend $900.99 less ($599 vs $1499.99)
- You need longer battery life (12 hours vs 2)
Buy the Vuzix M400 Smart Glasses if…
- You want a built-in camera
- 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 |  Vuzix M400 Smart Glasses $1,500 |
|---|---|---|
| Price | ||
| Price | $599 | $1,500 |
| Optics | ||
| Optics type | waveguide | — |
| Dimming control | ✓ Yes | ✓ Yes |
| 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 | Works alongside prescription glasses / safety frames via mounting options |
| Physical | ||
| Weight (g) | — | 190 |
| Foldable | ✕ No | ✕ No |
| Battery & power | ||
| Battery life (hours) | 12 | 2 |
| Connectivity | ||
| Connectivity | — | USB-C |
| Compatible devices | — | Standalone, iOS, Android |
| Computing | ||
| Operating system | Halliday app: 45+ language live translation, Meeting Flow (captions, transcripts, action items), Cheatsheet teleprompter | Android 9.0 (upgraded builds available; APK sideloading) |
| Chipset | — | Qualcomm Snapdragon XR1 (8-core, 2.52GHz), 6GB RAM, 64GB storage |
| Sensors & input | ||
| Camera | ✕ No | 12.8MP |
| Microphones | 4 | — |
| Speakers | ✕ No | open-ear |
| Tracking | — | 3DoF |
| Voice control | ✓ Yes | — |
| AI assistant | Halliday AI ("Hey Halliday" wake word) | — |
Buy the Halliday G2
Buy the Vuzix M400 Smart Glasses
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More ways to decide
Halliday G2 vs Vuzix M400 Smart Glasses: FAQs
Which is newer: the Halliday G2 or the Vuzix M400 Smart Glasses?
The Halliday G2 is newer, released September 2026, versus September 2019 for the Vuzix M400 Smart Glasses.
Which is cheaper: the Halliday G2 or the Vuzix M400 Smart Glasses?
The Halliday G2 costs $599 and the Vuzix M400 Smart Glasses costs $1499.99, making the Halliday G2 $900.99 cheaper.
What is the main difference between the Halliday G2 and the Vuzix M400 Smart Glasses?
Based on recorded specs, the Halliday G2 leads on price ($900.99 cheaper) while the Vuzix M400 Smart Glasses leads on camera (Has built-in camera).