Ultimate Ears Wonderboom 4
Last updated: 13 October 2026
The Ultimate Ears Wonderboom 4 is a small, round Bluetooth speaker that plays sound in every direction, survives a 1.5 metre drop and floats if it lands in water. It runs for up to 14 hours on a charge and is rated IP67 against dust and water. The black Wonderboom 4 cost £69.99 on Amazon UK, sold by Amazon, and the same on Ultimate Ears' UK store, down from £89.99. I checked the prices and stock on 13 October 2026.
Buy the Wonderboom 4 on Amazon UK, £69.99
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What the Wonderboom 4 does
It plays 360-degree sound, so it works in the middle of a picnic blanket or a table rather than pointed at one person. The loop on top hangs it from a bag, a branch or a shower rail.
Outdoor Boost is a button that retunes the sound for listening outdoors. Podcast Mode brings voices forward for talk radio and audiobooks.
Bluetooth reaches up to 40 metres, so your phone can stay in a bag at the far end of the garden. It charges over USB-C, which replaced the micro-USB port on the Wonderboom 3.
Built for water, sand and drops
The IP67 rating means it is sealed against dust and can be submerged in water. It also floats, so a speaker knocked into a pool or a river comes back up. Ultimate Ears drop-tests it from 1.5 metres, roughly shoulder height.
Pairing two Wonderboom speakers
Press the button once to link a second Wonderboom and play the same music from both. Press it again and the pair splits into left and right stereo.
It only pairs with another Wonderboom 3 or 4. Ultimate Ears says it will not connect to a Wonderboom 1 or 2, or to the bigger Boom, Megaboom and Hyperboom speakers, so an older Wonderboom 2 cannot join it.
Wonderboom 4 key facts
- Price: £69.99 on Amazon UK in black, sold by Amazon; £69.99 on the Ultimate Ears UK store, reduced from £89.99
- Battery: up to 14 hours
- Protection: IP67 dust and waterproof, and it floats
- Drop test: 1.5 metres
- Range: up to 40 metres over Bluetooth 5.2
- Charging: USB-C
- Size and weight: 104 x 95.3mm and 420g, about the weight of a can of beans
- Modes: Outdoor Boost and Podcast Mode
- Pairing: double up or stereo with another Wonderboom 3 or 4
- Rating: 4.5 out of 5 from 755 ratings on Amazon UK
Who the Wonderboom 4 suits
- Beach, pool and camping trips: it floats, shrugs off sand and lasts a full day out.
- The shower and the bathroom: it hangs from its loop and the IP67 rating covers splashes.
- Podcast and audiobook listeners: Podcast Mode makes speech clearer.
Our guide to the best portable speakers in the UK compares it with bigger and cheaper Bluetooth speakers. More music presents are in the gift guide for audiophiles.
The limits
Pairing only works with a Wonderboom 3 or 4, so an older Wonderboom or a bigger Boom speaker you already own cannot join in.
There is no app, no microphone for calls and no aux input. TechRadar's review also found it a small step up from the Wonderboom 3, with USB-C charging and Podcast Mode as the main changes.
Amazon prices the colours separately, so the price on the button may change with stock. If you are not in a hurry, use camelcamelcamel or a similar tool to track the Amazon price.
Where to buy the Wonderboom 4 in the UK
Amazon UK and the Ultimate Ears Wonderboom 4 page both had the black speaker at £69.99. Ultimate Ears' own store gives free standard delivery on orders over £29 and lists every colour. For a second opinion on the sound, TechRadar's Wonderboom 4 review covers its testing.
FAQs
How much is the Wonderboom 4?
On 13 October 2026 the black Wonderboom 4 was £69.99 on Amazon UK and £69.99 on the Ultimate Ears UK store, down from £89.99.
Is the Wonderboom 4 waterproof?
Yes. It is rated IP67 against dust and water, and it floats.
How long does the battery last?
Up to 14 hours on a charge, according to Ultimate Ears.
Can you pair a Wonderboom 4 with a Wonderboom 2?
No. It pairs only with another Wonderboom 3 or 4.
What happened to the Wonderboom 2?
It is no longer sold new on Amazon UK. The Wonderboom 4 is the current model.
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