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The Bose SoundLink Flex is a rugged, palm-sized portable Bluetooth speaker, and the second-generation model (2024) remains one of the best-built small speakers you can buy in 2026, especially at its frequent $99 to $119 sale prices. It launched at $149 with an Ingress Protection 67 (IP67) waterproof and dustproof rating, a 12-hour battery rating, Bluetooth 5.3, and Bose’s PositionIQ orientation sensing. This Bose SoundLink Flex review explains what changed from the 2021 original, what independent testers say about its sound and battery life, and which portable speakers on Amazon you should compare.
Quick verdict: The SoundLink Flex 2nd gen pairs a tough, floating build with warm, surprisingly deep sound for its size, and its app equalizer fixes its thin out-of-the-box bass. Its mono, narrow sound, short real-world battery life, and lack of an audio input hold it back, and it barely improves on the first generation. Buy it on sale if durability and looks matter most. Check the Bose SoundLink Flex price on Amazon.
Key takeaways
- What it is: A 1.3-pound portable Bluetooth speaker with an IP67 rating, Bluetooth 5.3, and a 12-hour battery rating; Bose released this second generation in fall 2024.
- Price: It launched at $149, Bose now lists it at $159, and 9to5Toys found it at $99 to $119 in July 2026. Prices change often.
- Main strength: Rugged build and warm, deep sound that testers say improves a lot with the app’s equalizer.
- Main weaknesses: Mono sound with a narrow soundstage, and SoundGuys measured just 7 hours and 3 minutes of battery life at 80 decibels.
- Status: The 2nd gen remains Bose’s current SoundLink Flex, with no third generation announced as of November 2026.
Bose SoundLink Flex (2nd Gen) at a glance
| Spec | Bose SoundLink Flex (2nd Gen) |
|---|---|
| Release | Fall 2024 (original SoundLink Flex: 2021) |
| Launch price | $149; Bose now lists it at $159 |
| Size and weight | 7.93 x 3.56 x 2.06 inches; about 1.3 pounds (589 grams) |
| Durability | IP67 dust and water resistance; silicone-wrapped body that floats |
| Bluetooth | Version 5.3 with multipoint; range up to 30 feet |
| Codecs | Subband Coding (SBC), Advanced Audio Coding (AAC), and aptX on Snapdragon Sound-certified Android phones |
| Battery | Up to 12 hours (Bose rating); about 4 hours to charge |
| Charging | Universal Serial Bus Type-C (USB-C), charging only; no auxiliary input |
| Controls and app | Shortcut button, built-in microphone, PositionIQ, and Bose app with a three-band equalizer |
| Multi-speaker | Stereo mode, Party mode, and SimpleSync with compatible Bose products |
Specs come from Tom’s Guide, SoundGuys, What Hi-Fi?, and World Wide Stereo’s spec listing.
What changed from the first-generation Flex
The second-generation Flex looks nearly identical to the 2021 original, and it keeps the same $149 launch price, 12-hour battery rating, and IP67 rating, according to Tom’s Guide’s launch report. Bose added a Shortcut button that can trigger your voice assistant, open Spotify, or pair a second speaker. It also moved from Bluetooth 4.2 to Bluetooth 5.3, added multipoint so two phones can stay connected, and added aptX support for higher-quality streaming from compatible Android phones.
The companion app changed, too. The Flex 2nd gen uses the Bose app, which offers a three-band equalizer, while Tom’s Guide’s biggest complaint about the original was its lack of adjustable sound. If you already own a first-gen Flex, SoundGuys concludes the upgrades are too minor to justify replacing it.
Design and durability
The Flex keeps its slim, rectangular shape with a powder-coated steel grille, a silicone body, and a utility loop for hanging it from a backpack or bike. It weighs about 1.3 pounds, so it travels easily. Bose rates it IP67, which means it can handle dust and sit underwater up to 1 meter for 30 minutes, and it floats. Tom’s Guide calls it one of the best-looking Bluetooth speakers, though the silicone surface collects lint and dust, and SoundGuys found the buttons a little mushy.
PositionIQ uses built-in sensors to detect whether the speaker stands up, lies flat, or hangs, and it adjusts the sound to match. SoundGuys notes you can’t turn this feature off. Bose sells the Flex in black, Blue Dusk, Sandstone, and Alpine Sage, plus rotating limited-edition colors such as Sunset Peach.
Sound quality: what reviewers found
headphonecheck.com describes “warm, full-bodied sound with impressively deep bass” and clear vocals, with slightly rolled-off treble and limited detail that makes orchestral music feel constrained. Tom’s Guide found the bass thin out of the box, but raising bass to about 5 or 6 in the app’s equalizer, trimming the mids slightly, and lifting the treble by about 3 added definition and presence. SoundGuys reached the same conclusion: the stock tuning sounds safe, and a bass boost of +6 with treble at +3 noticeably improves punch and clarity.
The Flex plays in mono, and its soundstage is narrow and directional. Tom’s Guide calls that its main weakness, and pairing two Flex speakers in Stereo mode fixes it at roughly double the cost. SoundGuys also found that past about 80% volume, Bose’s processing cuts bass to prevent distortion, so the Flex suits a picnic or small patio better than a big backyard party.
Battery life and connectivity
Bose rates the Flex for up to 12 hours, but SoundGuys measured 7 hours and 3 minutes while looping music at 80 decibels, and Bose itself says maximum volume drains it in about 3 hours. Headphonecheck.com calls battery life the speaker’s biggest weakness and notes that rivals such as the Beats Pill and Tribit StormBox Flow last longer. A full charge takes about 4 hours over USB-C, and the port charges only; it doesn’t accept audio.
Bluetooth 5.3 and multipoint make it easy to switch between two phones, and the built-in microphone handles speakerphone calls. Keep a USB-C wall charger in your bag, and a protective carrying case helps if you toss it in a backpack.
Pros and cons
Pros
- Rugged IP67 build that floats and survives drops
- Deep, warm bass for its size once you adjust the equalizer
- Bluetooth 5.3 with multipoint and aptX on compatible Android phones
- PositionIQ tunes the sound for how you place it
- Stereo and Party modes with a second speaker
Cons
- Mono sound and a narrow soundstage
- Only a three-band equalizer
- Battery fell well short of 12 hours in SoundGuys’ test
- No auxiliary input or USB-C audio
- Few upgrades over the first generation
Bose SoundLink Flex vs. other portable speakers
Amazon is our main affiliate partner, and it carries the SoundLink Flex along with its biggest rivals. Here’s how they compare:
Compare similar portable Bluetooth speakers on Amazon
| Speaker | Water and dust rating | Standout feature | Best for | Shop |
|---|---|---|---|---|
| Bose SoundLink Flex (2nd Gen) | IP67 | Premium build and PositionIQ | Style and durability | Check price |
| JBL Flip 7 | IP68 | Same list price, larger and louder | More volume for the money | Check price |
| Beats Pill | IP67 | Longer battery life, per headphonecheck.com | iPhone owners and long days out | Check price |
| Anker Soundcore Motion 300 | IPX7 | Stereo playback and LDAC for about $80 | Budget shoppers | Check price |
| Bose SoundLink Micro | IP67 | Smaller Bose speaker with a strap | Bikes and ultralight packs | Check price |
- JBL Flip 7: SoundGuys names it the closest rival at $149.95, with a similar feature set. See the JBL Flip 7 on Amazon.
- Beats Pill: Headphonecheck.com points to its longer battery life as a reason to choose it over the Flex.
- Anker Soundcore Motion 300: SoundGuys suggests it for buyers who want stereo sound and LDAC support for less, though it weighs more.
- Bose SoundLink Micro: A smaller Bose option for cycling and hiking. If you want sound at home instead, read our Sonos Era 100 review, a Wi-Fi smart speaker with far more room-filling sound.
Who should buy the Bose SoundLink Flex?
The SoundLink Flex suits hikers, beachgoers, and anyone who wants a tough, attractive speaker for the shower, kitchen, or campsite. It also makes a strong gift at sale prices. Skip it if you need all-day battery life at high volume, stereo sound from one unit, or a wired input. If you want personal audio for the trail instead, our JBL Vibe Flex 2 review covers open-fit earbuds that keep you aware of your surroundings.
Frequently asked questions
What’s the difference between the Bose SoundLink Flex 1st and 2nd gen?
The Bose SoundLink Flex 2nd gen keeps the same design, sound, IP67 rating, and 12-hour battery rating, but adds Bluetooth 5.3, aptX support on compatible Android phones, a Shortcut button, and multipoint pairing. SoundGuys found that the two sound essentially identical, so first-gen owners have little reason to upgrade.
Is the Bose SoundLink Flex waterproof?
Yes, the Bose SoundLink Flex is waterproof and dustproof with an IP67 rating, which means it can survive submersion in up to 1 meter of water for 30 minutes. It also floats, so a dip in the pool won’t sink it.
How long does the Bose SoundLink Flex battery last?
The Bose SoundLink Flex 2nd gen lasts up to 12 hours per charge according to Bose, but real results vary with volume. SoundGuys measured 7 hours and 3 minutes at a steady 80 decibels, and Bose says it lasts about 3 hours at maximum volume.
Can you connect two Bose SoundLink Flex speakers?
Yes, you can connect two Bose SoundLink Flex speakers through the Bose app. Stereo mode sends the left channel to one and the right channel to the other, and Party mode plays the same audio on both.
Final verdict
The Bose SoundLink Flex 2nd gen offers a beautifully built, waterproof speaker with warm, deep sound once you tweak the equalizer. Its narrow mono soundstage, shorter real-world battery life, and small upgrades over the original keep it from being a must-buy at $159, but at $99 to $119 it’s an easy recommendation for outdoor listening. Check the current Bose SoundLink Flex price on Amazon.