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 $190 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 Earfun Uboom Slim. It is rated higher for sound quality than the Bose Soundlink Revolve+ II and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Bose Soundlink Revolve+ II | Earfun Uboom Slim | |
|---|---|---|
| Price | $269.00 | $79 |
| Ranked | #48 of 145 in Medium Size Portable Bluetooth Speakers | #41 of 145 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 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 |
Related Speaker Comparisons
How Earfun Uboom Slim compares with other leading options:
- Earfun Uboom L vs Earfun Uboom Slim
- Soundcore Motion 300 vs Earfun Uboom Slim
- JBL Charge 6 vs Earfun Uboom Slim
- JBL Flip 6 vs Earfun Uboom Slim
- JBL Flip 7 vs Earfun Uboom Slim
Prices on this page were last checked September 26, 2026 at 11:14 PM 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Bose Soundlink Revolve+ II: $269.00 Amazon eBay
Older model: the Bose Soundlink Revolve+ (ranked lower, rated 3.6/5).
Pros: True 360° sound stays consistent no matter where you stand around it, unlike most portable speakers.
Cons: Overly boosted bass, warm sounding. Boosted mids. Rolled off treble. Only IP55.
Full Bose Soundlink Revolve+ II review and specifications →
| App | Bose Connect |
|---|---|
| Aux Input | Yes |
| Battery Life | 17 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 3.2” x 6” x 3.2” (82 x 152 x 82 mm) |
| Drivers | 1x omnidirectional full-range transducer + 2x passive radiators (driver size undisclosed by Bose) |
| EQ | No |
| IP Rating | IP55 |
| Omnidirectional | Yes |
| Power Input | Micro USB |
| Stereo | No |
| Strap | No |
| TWS | Yes |
| Weight | 2 lbs (0.91 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Bose Soundlink Revolve+ II vs Bose Soundlink Revolve+
- Bose Soundlink Revolve+ II vs W-King D320
- Bose Soundlink Revolve+ II vs Soundcore Glow
- Bose Soundlink Revolve+ II vs JBL Pulse 5
- Bose Soundlink Revolve+ II vs Sonos Play
- Bose Soundlink Revolve+ II vs Bose Soundlink Revolve
- Bose Soundlink Revolve+ II vs Xiaomi Sound Outdoor
- Bose Soundlink Revolve+ II vs Tribit Stormbox Flow
- See all 89 comparisons
Earfun Uboom Slim: $79 eBay
Pros: Excellent pricing, strong waterproof build (IPX7), good battery life (16 hours), smooth sound with volume compensation, speakerphone capability. Measured bass extension of ~63Hz (-10dB).
Cons: Not as deep bass as others. Warm tuned, peaks in the mids and lower treble, rolled off upper treble
Full Earfun Uboom Slim review and specifications →
| Amplifier Power | 20W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~63Hz |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) |
| Drivers | 45mm speaker drivers |
| EQ | No |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.2 lbs (560 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Earfun Uboom Slim vs Xiaomi Sound Outdoor
- Earfun Uboom Slim vs Bose Soundlink Flex
- Earfun Uboom Slim vs Bose Soundlink Flex 2nd gen
- Earfun Uboom Slim vs Tribit Xsound Plus 2
- Earfun Uboom Slim vs Soundcore Boom 3i
- Earfun Uboom Slim vs Soundcore 3/Soundcore Select 2
- Earfun Uboom Slim vs Sony ULT Field 3
- Earfun Uboom Slim vs Xiaomi Sound Party
- See all 16 comparisons