120hrs
Less charging. More showing up.Up to 120 hours of total listening with the charging case. Refuel your earbuds between workouts.
Total includes case recharges. Runtime varies with settings and use.
YOUR SOUNDTRACK. YOUR NEXT PERSONAL BEST.
Mifo O5
Gen 4.
All in. Every session.
Wireless earbuds for running & gym
Big sound. A low-profile fit. Built to move from the first kilometre to the last rep.
Find your training edge1 / 7
In stock. Ready to ship.
Your next training partner.
Verified by Judge.me£99.99incl. VAT
Free UK shipping
Pairs
LESS FRICTION. MORE FORWARD.
For the work
you put in.
Less adjusting.
More running.
Your rhythm is hard-earned. Keep it. The low-profile O5 shape sits close to your ear, so your earbuds feel like part of your kit, not something to keep checking.
- 01
A fit with a head start
Shaped from research across 2,000+ ears. Find your seal with the included ear tips.
- 02
Hear more of the world
Switch to transparency mode when you want ambient sound alongside your playlist.
- 03
Make the long run yours
App EQ lets you dial in the soundtrack, from steady kilometres to the final push.
THE SCIENCE OF STAYING PUT
2,000+ ear shapes.
One stay-put obsession.
Less adjusting.
More of what moves you.
Built around ears.
Not guesswork.
We studied more than 2,000 different ear shapes to refine the O5 fit. The result is a low-profile contour designed to stay secure through sprints, gym sets and long training sessions.
A secure fit starts with the right ear tips. Individual fit varies.How we build a secure fit
Study the shape
Understand the curves and differences that make every ear unique.
Keep it close
A sculpted, stemless housing sits low in the ear, with less bulk outside it.
Make it your fit
Choose the ear tips that give you a snug seal before you turn up the effort.
O5 PERFORMANCE HERITAGE
Battle-tested.
Far beyond the finish line.
From professional athletes and Olympians to sporting enthusiasts around the world, the O5 family has been part of the effort. Gen 4 carries that active-use heritage into your next session.
Built on Mifo's O5 athlete heritage. Explore the Mifo story
YOUR KIT JUST LEVELLED UP
Serious technology.
Everyday advantage.
Engineered for your session.
Ready for everything after.
Feel the beat.
Find your zone.
Powerful bass meets LDAC high-resolution playback and hybrid ANC. Go deeper into your playlist, then switch to transparency when you need the world.
Explore both listening modesTwo devices.
One less interruption.
Bluetooth 6.0 and multipoint keep compatible devices connected. A 60 ms low-latency mode helps training videos stay in step.
BLUETOOTH 6.0 / MULTIPOINTMetal. Not
more plastic.
Precision-machined, recyclable aircraft-grade aluminium outer bodies and charging case. A considered finish for kit you reach for every day.
AIRCRAFT-GRADE ALUMINIUMExplore the full Gen 4 specification
- Sound
- LDAC high-resolution playback; stereo DAC with 104 dB SNR. Compatible source required.
- Noise control
- Hybrid feedforward and feedback ANC, transparency mode.
- Calls
- Three microphone inputs, 102 dB ADC and AI beamforming.
- Wireless
- Bluetooth 6.0, multipoint; 60 ms low-latency mode with SBC/AAC.
- App
- iOS and Android: EQ, listening modes, touch controls, battery monitoring and firmware updates.
- Power
- Up to 120 hours total with the charging case; USB-C device-charging capability. Phone recharge varies by battery capacity and charging conditions.
- Fit and materials
- Low-profile shape informed by 2,000+ ear shapes; recyclable aircraft-grade aluminium outer earbud and charging-case bodies.
SOUND ON YOUR TERMS
Find your focus.
Let life back in.
Active noise cancelling for your own space. Transparency for the world around you. Two listening modes, ready for different parts of your day.
HYBRID ACTIVE NOISE CANCELLING
Less background. More beat.
Turn down the distractions and get into your session. Hybrid ANC reduces unwanted background noise, giving your playlist more room when you train indoors, travel or unwind.
- Two ways to tackle noise
- Feedforward and feedback noise control work together to reduce the sound you don't want in your listening.
- Made for your focus time
- From solo gym sets to indoor intervals, keep your attention on the music that moves you.
- Start with a good seal
- Choose a snug, comfortable fit from the included silicone ear tips to help noise reduction and bass performance.
ANC reduces noise; it does not remove every sound. Performance varies with fit and surroundings.
TRANSPARENCY MODE
Let the outside in.
Keep your earbuds in and bring more of your surroundings into your listening. Transparency mode lets ambient sound through alongside your music, for the moments when you don't want to shut the world out.
- Hear beyond the playlist
- Let voices and everyday sounds into your listening without taking your earbuds out.
- Between sets and on the move
- Hear a training partner between sets or more of the space around you on your post-workout walk.
- You choose the balance
- Switch listening modes in the Mifo app, and keep your music at a comfortable volume.
Stay attentive outdoors. Transparency is not hearing protection and does not guarantee you will hear traffic or other hazards.
THE FREE MIFO APP
Your workout. Your sound.
More bass for your next set. A balanced mix for your long run. Make every playlist your own, on iPhone or Android.
Fine-tune your EQ
Dial in the bass, balance and detail you love.
Choose your listening mode
Switch between noise cancellation and transparency.
Make the controls yours
Set your earbud tap controls and check your battery.
WHAT'S IN THE BOX
Unbox your next
training partner.
From the first unboxing to your first session. Your earbuds, charging case and fit essentials, together in signature Mifo packaging.
INCLUDED WITH EVERY GEN 4
O5 Gen 4 earbuds
One pair in your chosen colour. Low-profile sound for the track, gym and everything after.
Aluminium charging case
Recharge between sessions. Up to 120 hours of total listening with case recharges.
Five pairs of silicone ear tips
Find your comfortable seal before the first warm-up. A better fit starts with the right tips.
USB-C charging cable
Plug in, top up and get your kit ready for the next training day.
And a little extra for your kit bag.
Your free Airfome hard-shell carrying case is added separately, one per pair. A complimentary carrying case, separate from the charging case.
A LITTLE EXTRA. A LOT OF USE.
Your kit.
All together.
A free Airfome hard-shell case.
Included with every pair.
From your gym bag to race weekend, keep your charging case and small essentials in one neat, protected place.
Protective hard shellZip closure & mesh pocketCompact, easy-carry design
Automatically included. No code. One carrying case per pair.
Trackside1 / 5
Two cases. Two different jobs. Your aluminium case keeps you charged. Your free Airfome case keeps your kit together.
FROM WARM-UP TO WIND-DOWN
More power
in your corner.
The charging case doubles as a USB-C power bank. A useful backup when your phone needs a top-up after a long day out.
Phone charging depends on battery capacity and conditions.COMPARE TO MIFO
Better technology.
Half the price.
More power for your training. More left for the rest of your kit. Get 120-hour total listening, hybrid ANC and a USB-C power bank for £99.99.
Less than half the reference price of every model below. Competitor price benchmark: 22 October 2026; current offers may differ.
| YOUR KIT, COMPARED | MIFO O5 Gen 4£99.99Current price | AppleAirPods Pro 3£219.00Listed UK price | SonyWF-1000XM6£250.00UK RRP | BoseQC Ultra Earbuds 2£299.95Listed UK price | SamsungGalaxy Buds4 Pro£219.00Listed UK price |
|---|---|---|---|---|---|
| Battery endurance | Up to 120 hoursEarbuds and case combined | Up to 8h per charge, ANCSee manufacturer test conditions | See Sony test conditionsSee manufacturer test conditions | Up to 6h per charge, ANCSee manufacturer test conditions | See Samsung test conditionsSee manufacturer test conditions |
| Find your focus | Hybrid ANCPlus transparency mode | ANC + transparency | Adaptive ANC | ANC + Aware mode | Adaptive ANC |
| Tune your workout | Mifo app EQiOS + Android | Apple device settingsBest with iPhone | Sony Sound ConnectiPhone + Android | Bose appiPhone + Android | Galaxy WearableBest with compatible Galaxy |
| Charge your phone | USB-C power bankBuilt into the charging case | Not listedNo device-charging feature listed | Not listedNo device-charging feature listed | Not listedNo device-charging feature listed | Not listedNo device-charging feature listed |
| Phone compatibility | iPhone + AndroidFeatures depend on compatible devices | Best with iPhoneCheck device compatibility | iPhone + AndroidCheck device compatibility | iPhone + AndroidCheck device compatibility | Best with compatible GalaxyCheck device compatibility |
| Extra cost vs Gen 4 | £0 extraFree case included | +£119.01At reference price | +£150.01At reference price | +£199.96At reference price | +£119.01At reference price |
Reference prices are in GBP and were recorded on 22 October 2026, including the RRP, listed or launch price indicated. This is not live pricing; current retail promotions may differ.
Battery figures include case recharges and use each manufacturer's published conditions, not identical laboratory tests. Gen 4 runtime varies with volume, ANC, codec and use. Advanced audio, switching and app features depend on compatible devices. Specifications are not a ranking of sound or ANC quality.
Comparison notes & sources
Mifo values are final Gen 4 specifications and platform features. UK competitor prices and features were checked on 22 October 2026. Manufacturer pages linked below describe their own products; a feature marked "not listed" is not confirmed by the published specification.
A FIT PEOPLE COME BACK TO
Thousands of ears.
Plenty of love.
4.7/5
6,140 Mifo customer reviews
From the Mifo O5 family.Small ears. Good fit.
"I have really small ears and they fit me."
Fit. Sound. Build.
"Amazing fit, great sound and build quality."
Back for another pair.
"Just purchased my third pair"
Verified by
Are these suitable for running and gym training?
Gen 4 has a compact, low-profile fit designed for active use. Try the included ear tips to find a secure, comfortable seal before your first session. Fit varies by person. Use transparency when you need ambient sound and stay attentive outdoors.
How does active noise cancelling work?
Gen 4 uses hybrid feedforward and feedback active noise cancelling (ANC) to reduce unwanted background noise. It is useful for focused listening during indoor training, travel or downtime. Choose a snug ear-tip fit and select noise cancelling in the Mifo app. ANC does not eliminate all sound; its effect varies with fit and surroundings.
What is transparency mode, and when should I use it?
Transparency mode lets ambient sound through alongside your music, so you can hear more of the world without removing your earbuds. Switch to it in the Mifo app when you want to hear a training partner or your surroundings. Keep the volume comfortable and stay attentive: transparency does not guarantee you will hear traffic or other hazards.
What exactly is included for £99.99?
A pair of Mifo O5 Gen 4 earbuds in your chosen colour, the aluminium charging case, five pairs of silicone ear tips and a USB-C charging cable. You also receive one Airfome hard-shell carrying case per pair, with free UK shipping.
Is the free case different from the charging case?
Yes. The aluminium charging case powers your earbuds and works as a USB-C power bank. The free Airfome case is a separate zip-up protective carrying case that holds your charging case and keeps small accessories together. It does not charge devices.
Does 120 hours mean one continuous charge?
No. Up to 120 hours is the combined listening time of the earbuds and the recharges provided by the charging case. Actual runtime depends on volume, ANC, codec, calls and other settings.
Does it work with iPhone and Android?
Yes. Bluetooth pairing works with compatible devices. The Mifo app is available for iOS and Android for EQ, listening modes, touch controls, battery monitoring and firmware updates. LDAC high-resolution playback requires a compatible source; it is not supported by iPhone.
When will my order ship?
Gen 4 is in stock in the UK and ready for immediate dispatch. Free UK shipping is included. Tracking is emailed when your order ships. Delivery time depends on your location.
Where do the reviews and recommendations come from?
The 4.7/5 rating and customer quotes come from earlier Mifo O5 models, collected through Judge.me. They reflect the O5 family's track record, not Gen 4-specific reviews. The editorial recommendations also recognise earlier O5 models.
What about warranty and returns?
Your order is sold and supported by Mifo UK. Read the current warranty and refund terms through the policy links in the footer before purchasing.
ONE PAIR. EVERY PART OF YOUR DAY.
Make your
next move.
Mifo O5 Gen 4. £99.99.
Free shipping. Free Airfome case.
