Short answer: the Ultimate Ears Miniroll if sound quality matters most, the Monster Bluetooth Speaker if price matters most. The Ultimate Ears Miniroll ranks #12 of 47 small speakers at $49.99. The Monster Bluetooth Speaker ranks #31 at $19.99, $30 cheaper.
What the Monster Bluetooth Speaker offers: A very light, IPX7-rated mini speaker with USB-C charging, aux and microSD playback, speakerphone support and TWS pairing. It is a convenient rugged travel speaker when water resistance and small size matter more than bass. Watch for: Its tiny 36mm driver has very limited bass (about 95Hz at -10dB), elevated mids and rolled-off highs. It cannot deliver the scale, detail or battery endurance of stronger small-speaker rivals, and no app or EQ is available to improve the tuning.
What the Ultimate Ears Miniroll offers: Ultimate Ears Miniroll uses 45.6mm active with passive radiator. Its 279 g, claimed 12 hours (Manufacturer specified) battery life, IP67 protection, up to 83dB and mono playback make it a practical option for its intended room or portable use. Watch for: There is no companion app. No EQ adjustment.
Buy the Monster Bluetooth Speaker if the price matters more than sound quality. Buy the Ultimate Ears Miniroll if sound quality matters more than the price.
There is a real battery-life gap here: the Ultimate Ears Miniroll is rated for 12 hours, the Monster Bluetooth Speaker only 6.5 hours.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Monster Bluetooth Speaker | Ultimate Ears Miniroll | |
|---|---|---|
| Price | $19.99 | $49.99 |
| Ranked | #31 of 47 in Small Size Portable Bluetooth Speakers | #12 of 47 in Small Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | 95Hz | - |
| Battery Life | 6.5 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| EQ | No | No |
| IP Rating | IPX7 | IP67 |
| MicroSD Playback | Yes | - |
| Party Mode | No | Yes (PartyUp/Auracast, Miniroll-only) |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | Pointing up |
| TWS | Yes | Yes |
| Weight | 0.4 lbs (185 g) | 0.6 lbs (279 g) |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| Amplifier Power | 5W | 3W RMS |
| Dimensions | Specifications vary by model | 4.8" x 4.1" x 1.9" (122.7 x 105 x 48.1 mm) |
| Drivers | 1.4" (36mm) full-range driver | 45.6mm active with passive radiator |
| Digital Aux Input | No | No |
| Charging Time | - | 2.3 hours |
| Maximum SPL | - | 83dB (Manufacturer specified) |
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Prices on this page were last checked September 16, 2026 at 12:41 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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The Two Speakers In Full
Monster Bluetooth Speaker: $19.99 Amazon eBay
Pros: A very light, IPX7-rated mini speaker with USB-C charging, aux and microSD playback, speakerphone support and TWS pairing. It is a convenient rugged travel speaker when water resistance and small size matter more than bass. Measured bass extension of 95Hz (-10dB).
Cons: Its tiny 36mm driver has very limited bass (about 95Hz at -10dB), elevated mids and rolled-off highs. It cannot deliver the scale, detail or battery endurance of stronger small-speaker rivals, and no app or EQ is available to improve the tuning.
Full Monster Bluetooth Speaker review and specifications →
| Amplifier Power | 5W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 95Hz |
| Battery Life | 6.5 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | Specifications vary by model |
| Drivers | 1.4" (36mm) full-range driver |
| EQ | No |
| IP Rating | IPX7 |
| MicroSD Playback | Yes |
| Omnidirectional | Pointing up |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 0.4 lbs (185 g) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
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Ultimate Ears Miniroll: $49.99 Amazon eBay
Pros: Ultimate Ears Miniroll uses 45.6mm active with passive radiator. Its 279 g, claimed 12 hours (Manufacturer specified) battery life, IP67 protection, up to 83dB and mono playback make it a practical option for its intended room or portable use.
Cons: There is no companion app. No EQ adjustment.
Full Ultimate Ears Miniroll review and specifications →
| Amplifier Power | 3W RMS |
|---|---|
| App | No |
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built-in Microphone | Yes |
| Charging Time | 2.3 hours |
| Digital Aux Input | No |
| Dimensions | 4.8" x 4.1" x 1.9" (122.7 x 105 x 48.1 mm) |
| Drivers | 45.6mm active with passive radiator |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 83dB (Manufacturer specified) |
| Omnidirectional | Pointing up |
| Party Mode | Yes (PartyUp/Auracast, Miniroll-only) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 0.6 lbs (279 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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