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The short answer
Marshall Emberton III wins this comparison. Choose it if a longer advertised playtime matters. Marshall Emberton III advertises up to 32 hours, versus up to 14 hours for Ultimate Ears WONDERBOOM 4.
Ultimate Ears
A small poolside speaker that floats, with 360° playback and up to 14 hours of battery life. Outdoor Boost and Podcast Mode cover music outside and spoken audio.
Bettr Score
63.8/100
Marshall
360° sound and 32+ hours of playtime in a 1.48 lb speaker. IP67 protection makes it useful for beach bags and weekend trips, with a microphone for hands-free calls.
Bettr Score
64.1/100
| Ultimate Ears WONDERBOOM 4 | Specification | Marshall Emberton III |
|---|---|---|
$99.99 ✓ Winner | Reference price | $179.99 |
14 hours | Advertised battery life | 32 hours ✓ Winner |
14.82 oz ✓ Winner | Weight | 1.48 lb |
IP67 | Ingress protectionTie | IP67 |
4 | Durability tierTie | 4 |
5.2 | Bluetooth versionPersonal preference | 5.3 |
No | Can charge another deviceNot enough data | Not stated / not applicable |
No | USB audio inputNot enough data | Not stated / not applicable |
No | Auracast or compatible broadcast pairingNot enough data | Not stated / not applicable |
Yes | Floats in waterNot enough data | Not stated / not applicable |
No | Speakerphone | Yes ✓ Winner |
The buying advice
Choose Ultimate Ears WONDERBOOM 4 if you want less weight in your bag. Ultimate Ears WONDERBOOM 4 weighs 14.82 oz versus 1.48 lb — 8.82 oz less to carry.
Choose Marshall Emberton III if a longer advertised playtime matters. Marshall Emberton III advertises up to 32 hours, versus up to 14 hours for Ultimate Ears WONDERBOOM 4.
Ultimate Ears WONDERBOOM 4 weighs 14.82 oz versus 1.48 lb — 8.82 oz less to carry. Marshall Emberton III advertises up to 32 hours, versus up to 14 hours for Ultimate Ears WONDERBOOM 4. The recorded reference-price difference is $80.00.
Ultimate Ears WONDERBOOM 4 weighs 14.82 oz versus 1.48 lb — 8.82 oz less to carry.
Marshall Emberton III advertises up to 32 hours, versus up to 14 hours for Ultimate Ears WONDERBOOM 4.
Ultimate Ears WONDERBOOM 4 has the lower recorded reference price: $99.99 versus $179.99, a $80.00 difference.
Marshall Emberton III supports speakerphone calls; the other speaker’s verified specification says it does not.
People's Pick
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eBay — New
In stock · checked Oct 30, 2026
Price needs rechecking. Confirm at the retailer.
$58.49
Item + shipping · before tax
$58.49 + $0.00 shipping
We may earn a commission when you buy through links marked “Affiliate link.” This does not change your price or our scores. How we earn
eBay — New
In stock · checked Oct 30, 2026
Price needs rechecking. Confirm at the retailer.
$139.99
Item + shipping · before tax
$139.99 + $0.00 shipping
We may earn a commission when you buy through links marked “Affiliate link.” This does not change your price or our scores. How we earn
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