Short answer: the Tronsmart T8, if you are buying new. The EarFun Uboom Slim ranks higher than it (#43 vs #54 of 182 medium speakers, 3.7/5 vs 3.6/5) but is discontinued, so only consider it used; the Tronsmart T8 is still sold new at $49.99.
The EarFun Uboom Slim is the lighter pick. A slim, affordable waterproof stereo speaker with long battery life that doubles as a speakerphone. At 1.2 lbs (560 g) it weighs noticeably less than the Tronsmart T8 at 1.8 lbs (800 g). The tradeoff: Not as deep bass as others.
What the Tronsmart T8 does well: An affordable waterproof speaker with upward firing drivers that spread sound around, plus lights, app EQ, an aux input and stereo pairing. It has an adjustable EQ, which the EarFun Uboom Slim lacks. The catch: Against the Xiaomi Sound Outdoor, listeners in Mateusz Cholewa’s comparison found the T8 harsh and tiring, and Techder Audios’ test showed the Xiaomi Sound Party with deeper, heavier bass.
Buy the Tronsmart T8, since the EarFun Uboom Slim is discontinued and only worth hunting down used.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 14, 2026 at 6:17 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.
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Specifications Side By Side
| EarFun Uboom Slim | Tronsmart T8 | |
|---|---|---|
| Price | $79 Discontinued | $49.99 |
| Ranked | #43 of 182 in Medium Size Portable Bluetooth Speakers | #54 of 182 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~63Hz | - |
| Battery Life | 16 hours (Manufacturer specified) | 18 hours at 50% volume, lights off (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | Pointing up |
| Weight | 1.2 lbs (560 g) | 1.8 lbs (0.80 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | - |
| Bluetooth Version | 5.2 | 5.3 |
| Built-in Microphone | Yes | - |
| Drivers | 45mm speaker drivers | 2x upward firing full-range drivers + 1x woofer + 2x passive radiators |
| Amplifier Power | 20W | 40W |
| IP Rating | IPX7 | IPX7 |
| Digital Aux Input | No | - |
| Dimensions | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) | 8.6”H x 3.2”W x 3.2”D (218 x 82 x 82 mm) |
| App | No | Yes (Tronsmart) |
| Aux Input | Yes | Yes |
| EQ | No | Yes (app) |
| TWS | Yes | Yes |
| Charging Time | - | 4.5 hours |
| Frequency Response | - | 56Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
| MicroSD Playback | - | Yes |
| Strap | - | Yes (lanyard) |
Where the Ratings Come From
- EarFun Uboom Slim: reviews by スピーカー音質比較.
- Tronsmart T8: reviews by Mateusz Cholewa, Techder Audios and Jagist.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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