The Quest 3 and 3S are fantastic VR headsets, but they’re not perfect. Long sessions leave your face sore, the battery taps out too soon, and Meta still doesn’t offer built-in headphones. The Kiwi Design K4 Duo fixes all three in one slick upgrade and does it well enough to feel like it should’ve come in the box.
Kiwi Design K4 Duo adds comfort and balance
The K4 Duo replaces the Quest’s basic fabric headband with a rigid, adjustable strap. It uses the same layout as Meta’s official strap, not the halo style seen in Kiwi’s earlier H4, but it still balances the headset nicely. The battery sits at the rear, helping counteract the 459g weight up front, and a pleather-padded cushion makes extended wear a non-issue.
Even during long sessions like two hours in Batman: Arkham Shadow, the headset stayed secure and didn’t leave pressure marks or neck strain. The central head strap adds just enough padding to take the edge off.
Kiwi Design K4 Duo brings built-in headphones that impress
Audio is the real star here. The K4 Duo features flip-down on-ear headphones that deliver clear treble, strong mids, and decent bass. Compared to external buds or the Quest’s tinny speakers, it’s a huge leap forward.
Here’s what the audio setup gets right:
- Hinged earcups with tilt and height adjustment
- Thick foam cushions for comfort
- Minimal sound leakage under 60% volume
- Manual switch to toggle between speakers and headphones
No extra dongles, no charging case to remember, just flip and play.
Battery life and recharging are handled smartly
The battery adds roughly two more hours of playtime, depending on game intensity. A USB-C cable connects directly to the headset, and charging both units takes around 2.5 hours. The rear port supports 45W input and delivers 25W to the Quest, keeping things efficient.
Kiwi Design K4 Duo looks nearly first-party
With clean lines, a matching color finish, and discreet branding, the K4 Duo looks like a Meta-designed part. Surprisingly, Meta hasn’t built something similar yet. The price isn’t outrageous either $140 with frequent discounts, or £140 in the UK.
If you’re already deep into Quest 3 gaming, this strap turns “good enough” into great. Better balance, better sound, longer playtime, it’s the full upgrade Meta didn’t make.
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