Short answer: the Bogasing M5. It ranks #61 of 177 medium speakers by sound quality, rated 3.5/5, at $52.99; the Ultimate Ears Wonderboom 4 ranks #108, rated 2.9/5, and costs $64.99, so there is little reason to consider the other one.
The Ultimate Ears Wonderboom 4 is the lighter option. A small, tough waterproof speaker with a strap loop and USB-C charging, easy to clip on a bag for outdoor trips. At 0.9 lbs (420 g) it weighs much less than the Bogasing M5 at 1.7 lbs (757 g). The tradeoff: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
The Bogasing M5 is the better-sounding, longer-running choice. A compact, backpack friendly speaker with very long battery life and USB-C charging at a budget price. It is rated for 30 hours of battery against 14 for the Ultimate Ears Wonderboom 4. It keeps a wired aux input, which the Ultimate Ears Wonderboom 4 lacks. It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks. Watch for: Front/rear driver configuration.
Buy the Bogasing M5. It is rated higher for sound quality than the Ultimate Ears Wonderboom 4 and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A small, tough waterproof speaker with a strap loop and USB-C charging, easy to clip on a bag for outdoor trips.
A compact, backpack friendly speaker with very long battery life and USB-C charging at a budget price.
Prices on this page were last checked October 31, 2026 at 7:11 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
| Ultimate Ears Wonderboom 4 | Bogasing M5 | |
|---|---|---|
| Price | $64.99 | $52.99 |
| Ranked | #108 of 177 in Medium Size Portable Bluetooth Speakers | #61 of 177 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 14 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Maximum SPL | 87dB (Manufacturer specified) | 96dB (measured by Alan Ross Reviews) |
| Power Input | USB-C | USB-C |
| Stereo | No | No (front/rear drivers) |
| Omnidirectional | Yes | Yes |
| Weight | 0.9 lbs (420 g) | 1.7 lbs (757 g) |
| IP Rating | IP67 | IPX7 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.3 |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) | 6.3” x 3” x 2.8” (160 x 76 x 71 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) | 30W system |
| TWS | Yes | Yes |
| Party Mode | No | - |
| App | No | No |
| EQ | No | Yes |
| Built-in Microphone | No | - |
| Power Bank | No | Yes (USB-A) |
| Aux Input | No | Yes |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | 61Hz |
| MicroSD Playback | - | Yes |
| USB Playback | - | Yes |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 40W |
Related Speaker Comparisons
More top alternatives to Bogasing M5: