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The Boom Go 3i puts several practical extras into a small outdoor speaker. A flexible mounting strap, battery display, app EQ and emergency phone charging are useful whether it sits on a picnic table or travels on a bag. These details make it more interesting than its lighting effects alone.
It remains a small mono speaker. Its best role is nearby listening with a few conveniences that reduce the need to keep checking a phone.
The 15 W system is intended for close portable listening. SoundGuys considered the default tuning ordinary and found a more enjoyable result after adjusting the bass and treble through the app. 1 That is a useful reason to explore the EQ instead of assuming the factory preset is the only sound available.
BassUp 2.0 offers quick emphasis, while the custom settings are better suited to a repeated listening position. A speaker strapped to a bag and one lying on a table may need different choices. Keep enough volume in reserve for clarity, especially when outdoor noise encourages turning a small speaker all the way up.
Two matching units can form a stereo pair, while Auracast supports grouped playback with compatible speakers. Decide whether a second unit is meant to create a left/right listening position or simply extend coverage. Those are different uses of an otherwise similar pairing process.
The speaker has no AUX input or built-in microphone for calls. Phone charging through USB-C is useful, but should not be confused with USB audio input. The soundcore app adds EQ, lighting choices and control customization, making it worth installing even if most daily playback will use the physical buttons.
The normal 24-hour claim uses 50% volume, lights off and BassUp enabled. Eco Mode extends the headline figure to 40 hours with a different operating mode. SoundGuys tested the demanding setting of maximum volume with lights and BassUp active and measured five hours 55 minutes. 1 That gives a useful boundary for a louder afternoon.
The display makes remaining charge easier to assess than a few blinking LEDs. Its USB-C output can provide an emergency phone top-up, which is especially helpful when the phone is also the music source. Doing so spends the same energy reserve, so avoid planning both a long maximum-volume session and significant phone charging from one full battery.
The silicone strap can attach the speaker or form a carrying arrangement, giving it more placement options than a simple loose lanyard. At 380 g it is still noticeable on a small bag, but manageable for frequent carrying. Verify the attachment is secure before moving, particularly if the speaker could bounce against a hard surface.
IP68 and the manufacturer’s one-meter drop claim address common outdoor mishaps. The lighting can be customized or switched off, useful when the battery and status display are the only illumination wanted. These controls let the speaker suit a quiet campsite as well as a more social setting.
The Boom 3i is larger, with a 50 W rating and a design intended to remain upright while floating. It suits water-based trips where that orientation matters. The Boom Go 3i is easier to attach and adds the battery display and power bank, making it the more convenient choice for a compact daily kit.
Choose the Boom Go 3i for practical small-speaker features, particularly its display, strap and occasional phone charging. It rewards a little EQ adjustment and offers useful expansion options. Its battery claims are most meaningful when matched to the volume and lighting settings you plan to use.
This is a research-based review. The Fasit has not physically tested this product.
Independent sources cited in this article.
Measured 5 hours 55 minutes at maximum volume with lights and BassUp enabled. Reviewer preferred adjusted EQ over default tuning. Bluetooth 6.0, SBC/AAC and no call microphone verified in hands-on report.