Ultimate Ears WONDERBOOM 4 Portable Bluetooth Speaker
🔥 #38 in Portable Bluetooth Speakers · New Best rugged portable speaker under $100
Ultimate Ears WONDERBOOM 4 Portable Waterproof Bluetooth Speaker (Blue)
Ultimate Ears 3.6
#38
in Portable Bluetooth Speakers
$74 →
As of Jul 13, 2026
AI-estimated. See how we score. How we score Affiliate link — we may earn a commission
01 / Spec
Top features
Drivers2×1.5-inch woofers, passive radiators
Output Power13W
Frequency Response80Hz–20kHz
The Ultimate Ears WONDERBOOM 4 is a compact, IP67-rated waterproof Bluetooth speaker delivering balanced 360-degree sound with 14-hour battery life. Features include Outdoor Boost mode for louder outdoor use, Podcast Mode for vocal clarity, 131-foot (40m) Bluetooth range, and dual-speaker stereo pairing. The 4×4×8-inch form factor is highly portable with a carrying loop; it floats and withstands 1m submersion for 30 minutes. Drop-tested to 5ft and made with 31% recycled plastic. Best for: beach, pool, shower, travel, and casual listening where ruggedness and all-day playtime matter more than studio-grade audio. Charges via USB-C.
02 / Signals
Why it's hot
Rugged all-day portable speaker with waterproof design and balanced 360° sound.
- Value for money 93
- Review rating & velocity 81
- Community sentiment 92
- Brand reputation 100
- Search heat 77
- Est. return & defect rate 89
03 / Verdict
Pros & cons
Pros
- IP67 waterproof & dustproof, floats
- 14-hour battery life
- Balanced 360-degree sound
- Compact & pocketable with carry loop
- Stereo pairing (two units)
- Drop-proof from 5ft
- Outdoor Boost & Podcast Mode
Cons
- Bass can be boomy in some modes
- No 3.5mm aux input
- Limited high-volume clarity vs. larger speakers
- App required for advanced features
- Charging cable not included
Drivers2×1.5-inch woofers, passive radiators
Output Power13W
Frequency Response80Hz–20kHz
Battery14 hours
ChargingUSB-C, ~2.5 hours
Water Dust RatingIP67 (submerged 1m, 30 min)
Bluetooth Version5.3
Wireless Range131 feet (40m)
Stereo PairingYes (two units)
Aux MicNone
Dimensions4×4×8 inches
Weight420g (14.8 oz)
ColorsBlue, Black, Yellow, Red, Peach, Teal
05 / Your take
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05 / Compare
Compare the best alternative
One useful head-to-head in Portable Bluetooth Speakers, with the rows most likely to separate the contenders.
Open full comparison → 
JBL Flip 5 Portable Bluetooth Speaker, Red
Sound
Balanced, clear mids; controlled bass Best sound Balanced, punchy, warm midrange
Battery (h)
13 hours Longest battery 12 hours
Durability
Rugged fabric/rubber; proven drop/water survival Proven rugged build, minimal defect rate
06 / Rivals
Compare with
07 / Variations
Other colors
08 / Browse
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