Short answer: the JBL Grip, if you are buying new. The EarFun Uboom Slim ranks higher than it (#43 vs #98 of 179 medium speakers, 3.7/5 vs 3.1/5) but is discontinued, so only consider it used; the JBL Grip is still sold new at $69.95.
The EarFun Uboom Slim is the better-sounding option. A slim, affordable waterproof stereo speaker with long battery life that doubles as a speakerphone. It keeps a wired aux input, which the JBL Grip lacks. It plays in stereo from a single unit, unlike the JBL Grip. The catch: Not as deep bass as others.
The JBL Grip is the lighter option. A small, fully waterproof speaker with app EQ, ambient lighting, Auracast linking and USB-C audio input. At 0.8 lbs (385 g) it weighs noticeably less than the EarFun Uboom Slim at 1.2 lbs (560 g). It has an adjustable EQ, which the EarFun Uboom Slim lacks. The catch: Lacking deeper bass, definitely the worst of the JBL line until you get to the smaller clip.
Buy the JBL Grip if you want one new; the EarFun Uboom Slim is discontinued, so only look for it used.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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.
Specifications Side By Side
| EarFun Uboom Slim | JBL Grip | |
|---|---|---|
| Price | $79 Discontinued | $69.95 |
| Ranked | #43 of 179 in Medium Size Portable Bluetooth Speakers | #98 of 179 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~63Hz | ~68Hz |
| Battery Life | 16 hours (Manufacturer specified) | 14 hours (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.2 lbs (560 g) | 0.8 lbs (385 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.2 | 5.4 |
| Built-in Microphone | Yes | - |
| Drivers | 45mm speaker drivers | 1x 43x80mm fullrange |
| Amplifier Power | 20W | 16W |
| IP Rating | IPX7 | IP68 |
| Digital Aux Input | No | Yes (USB-C) |
| Dimensions | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) | 2.5” x 6” x 2.6” (64 x 152 x 65 mm) |
| App | No | Yes |
| Aux Input | Yes | No |
| EQ | No | Yes (7 band) |
| TWS | Yes | Yes |
| Party Mode | - | Yes (Auracast) |
| Frequency Response | - | 70Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
| Strap | - | Yes (strap) |
Related Speaker Comparisons
More worthwhile head-to-heads for EarFun Uboom Slim: