
Cambridge SoundWorks OontZ Ultra
Score: 83/100
Soundcore Select 4 Go
Score: 72/100Rankings

The OontZ Ultra delivers 14 W of sound, 20-hour battery life and IPX7 waterproofing with true wireless stereo capability. Android latency and distortion at max volume are notable drawbacks. Perfect for users seeking a compact, waterproof speaker with long playtime and TWS pairing.

The Soundcore Select 4 Go is an ultra-portable, IP67-rated shower speaker with 20 hours of playtime and a 30 m Bluetooth range, featuring a 9-band EQ via the app. Its limited 5 W output means it won't fill large spaces, and it lacks a wall charger. Great for solo swimmers, hikers, and on-the-go listening.
| Attribute | ![]() | ![]() |
|---|---|---|
20 hoursbest | 20 hoursbest | |
| ↓ lower better | 480 g | 264 gbest |
— | 115.1 mmbest | |
— | 2,400 mAhbest | |
14 Wbest | 5 W | |
30.5 mbest | 30 m | |
| ↓ lower better | — | 270 minutesbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Audio(1) | ||
Output Power (W) | 14 W | 5 W |
Connectivity(2) | ||
Bluetooth Version | 5.0 | 5.3 |
Bluetooth Range (m) | 30.5 m | 30 m |
Build & Design(3) | ||
Weight (g) | 480 g | 264 g |
Dimensions (H×W×D) (mm) | 71.1×71.1×165.1 mm | 48×82×120 mm mm |
IP Rating | IPX7 | IP67 |

Products in the top-left offer the best value (high score, low price).

Professional reviewers rate the OontZ Angle 3 Ultra highly for its portability, robust IPX7 waterproofing, long battery life, and surprisingly powerful 14 W sound output. They commend its accurate frequency response and reliable 100-foot Bluetooth range, while noting the higher latency on Android devices and the absence of multi-device pairing as the main technical shortcomings.
Everyday users consistently praise the speaker's loud, bass-rich audio, long battery life, and waterproof durability, describing it as an excellent value for outdoor and casual indoor listening. Recurring complaints focus on distortion at max volume, occasional Bluetooth dropouts beyond 30 ft, and limited controls on the secondary TWS unit.

“one of the best sounding under $40... EVER!”

“Ideal for solo swimming or showers”

“Stereo sound, deep bass via passive radiator, and durable waterproof design”




Professional reviewers consider the Soundcore Select 4 Go a best-budget portable speaker, praising its punchy, clear sound, strong bass for a 5 W driver, and the flexibility of a 9-band EQ app. The IP67 rating and floatable design earn high marks, as does the seamless Bluetooth 5.3 and TWS pairing. The main criticism from editors is the limited maximum volume, which makes it unsuitable for larger gatherings, and the omission of a wall charger.
Everyday users love the long 20-hour battery, the surprising bass and clarity for such a small device, and the rugged waterproof, floatable build that survives showers and pools. Common praise centers on portability, easy TWS pairing, and the customizable EQ. Recurring complaints focus on low maximum volume, occasional Bluetooth connectivity hiccups, and the missing wall charger.