Short answer: the EarFun Uboom Slim on value and water resistance, the Bose Soundlink Revolve+ II on 360 sound. The Earfun pairs excellent pricing with an IPX7 build and 16-hour battery, plus smooth sound with volume compensation, though its bass is not as deep and its mids and lower treble peak. The Revolve+ II stays consistent from any angle, but is only IP55 rated and costs $220 more.
What sells the Bose Soundlink Revolve+ II: Its true 360° sound stays consistent no matter where you stand around it, unlike most portable speakers. What doesn’t: it has overly boosted bass, a warm overall sound, boosted mids, rolled off treble, and only an IP55 water rating.
The EarFun Uboom Slim’s pitch: It has excellent pricing, a strong IPX7 waterproof build, good 16-hour battery life, smooth sound with volume compensation, and speakerphone capability. The compromise: its bass isn’t as deep as others, it’s warm tuned with peaks in the mids and lower treble, and the upper treble is rolled off.
Buy the Bose Soundlink Revolve+ II if you want one new; the EarFun Uboom Slim is discontinued, so only look for it used.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 11, 2026 at 3:26 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Bose Soundlink Revolve+ II | EarFun Uboom Slim | |
|---|---|---|
| Price | $299.00 | $79 Discontinued |
| Ranked | #50 of 179 in Medium Size Portable Bluetooth Speakers | #43 of 179 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 17 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| IP Rating | IP55 | IPX7 |
| Power Input | Micro USB | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| Weight | 2 lbs (0.91 kg) | 1.2 lbs (560 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.1 | 5.2 |
| Dimensions | 3.2” x 6” x 3.2” (82 x 152 x 82 mm) | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) |
| App | Bose Connect | No |
| Built-in Microphone | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | No | No |
| Drivers | 1x omnidirectional full-range transducer + 2x passive radiators (driver size undisclosed by Bose) | 45mm speaker drivers |
| Digital Aux Input | No | No |
| TWS | Yes | Yes |
| Strap | No | - |
| Bass Extension (-10dB) | - | ~63Hz |
| Amplifier Power | - | 20W |
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