Why it's a great deal
Ultimate Ears WONDERBOOM 4 Waterproof Bluetooth Speaker
4.5
(2,355 reviews)
$51.44
$99.99
FREE shipping with Prime · FREE delivery on $35+ orders
At $51.44 it's 34% below its 12-month average — the lowest price we've tracked.
Verified by Thrifle price tracking
Price intelligence
Is this a good price?
Tracked since Jun 11, 2025 · updated daily
Current price
$51.44
−34% vs 1YRAvg $75.34 (90D) · -32% vs 90D avg
This deal
$51.44
Typical price
$78.08
All-time low
$51.44
vs 12-mo average
−34%
Product info
About this deal
Amazon has the Ultimate Ears WONDERBOOM 4 Portable Bluetooth Speaker in Blue for $51.44 — 49% off the $99.99 list price. Rated 4.5 out of 5 stars across 2,328 reviews, with 500+ bought in the past month.
The Wonderboom 4 punches well above its size. True 360-degree sound, 14 hours of battery life, IP67 waterproofing (can be submerged in 1 meter of water for 30 minutes), floats, and a 131-foot Bluetooth range. The Outdoor Boost mode tunes the EQ for open environments, and a new Podcast Mode makes vocals sound clearer — a genuinely useful addition. The loop handle makes it easy to clip to a bag, hang from a tent, or carry one-handed.
Pair two units for true stereo left-right sound. Google Fast Pair means Android users connect instantly with one tap.
Reviewers consistently call it "small but mighty" — multiple owners mention being surprised by how loud it gets without distortion, and several bought a second one specifically to pair in stereo. The one legitimate gripe worth knowing: the battery indicator is vague — it just says "normal battery level" across a wide range, so you won't know exactly how much charge is left.
Blue is the only color at the 49% off price — other colors are 30% off at $69.99. Free 30-day returns through Amazon.
Deal facts
Features
- Balanced 360-Degree Sound: The WONDERBOOM 4 portable waterproof Bluetooth speaker features 360-degree sound in a petite package; boosted sound for up to 14 hours of playtime
- Outdoor Boost and Podcast Mode: Engineered for full stereo sound; tap the Outdoor Boost button for outdoor environments; use the new Podcast Mode to make vocals sound rich and clear
- 14 Hours of Boom: With a rechargeable battery that lasts throughout the day, this waterproof portable speaker booms on with up to 14 hours of playtime, so you can soak up every moment; Charging via USB-C cable (not included)
- Waterproof, Dustproof, and Floatable: IP67-rated this Bluetooth waterproof speaker can be submerged in 1m of water for 30 min; protected from dust; ideal for the pool, beach, or shower
- Double Up for Stereo: Pair up two WONDERBOOM 4 portable Bluetooth speakers for even bigger sound; press once to double up; press again for true stereo from both speakers, with left and right channels (not compatible with PartyUP)
- Durable Wireless Speaker With Range: 131 feet (40 meters) of range so you’re free to roam; plus it’s dirt-resistant and drop-proof (1) with a handy loop so you can take it with you
- Made With Recycled Plastic: Plastic parts in the WONDERBOOM 4 wireless Bluetooth speaker include a minimum of 31% post-consumer recycled plastic by weight
- (1) Drop-tested from 5 ft / 1.5 m
Specifications
| Brand | Ultimate Ears |
| Model | 984-001877 |
| Color | Blue |
| Dimensions | 4 in × 4 in × 8 in |
| Unit count | 1 |
| Warranty | 1 Year Limited Hardware Warranty |
| Category | Electronics |
| Released | Jun 26, 2024 |
| Part # | 984-001877 |
| List price (MSRP) | $99.99 |
| Recent demand | 3,000+ bought last month |
| Sold by | Amazon |
Product details sourced from Amazon. Specs and availability may change.
Frequently asked questions
3 questions
Is this a good price for Ultimate Ears WONDERBOOM 4 Waterproof Bluetooth Speaker?
At $51.44, this is 49% off the listed retail price of $99.99 — a verified saving of $48.55.
What is Amazon's return policy?
Amazon offers a 30 days return window. Free returns: Yes (most items). Restocking fee: None (marketplace sellers may vary). See the full Amazon return policy at https://thrifle.com/return-policy/amazon.
When does this deal expire?
This deal has already ended.
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