Bose
Bose 865983-0100-cr SoundLink Flex Bluetooth Waterproof Speaker
★★★★★
USB-CIP67
IP67-rated waterproof construction and PositionIQ adaptive audio deliver full-range sound that holds up wherever the day takes you.
$99.99*$119.00Save 15%
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*Price sourced from Amazon.com. Last updated:Jun 20, 2026.Price and availability are subject to change.
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Overview
Key Features
State-of-the-art design: SoundLink Flex outdoor speaker is packed with exclusive technologies and a custom-engineered transducer for deep, clear, and immersive audio at home or on the go
Clearest possible sound: Proprietary PositionIQ technology automatically detects the position of your portable Bluetooth speaker for optimal sound quality in any orientation or environment
Waterproof wireless speaker for travel: SoundLink Flex is rigorously tested to meet IP67 waterproof speaker standards. Crafted and sealed with waterproof materials, it even floats for outdoor adventures
Portable Bluetooth speaker: Built to resist water, dust, and debris, in a design that withstands drops and rust, this compact speaker goes wherever you do. It's also easy to hold and store, and resistant to corrosion and UV light
Rechargeable wireless speaker battery: Portable speaker charges through USB-C cable (included). Lithium-ion battery offers up to 12 hours of life per charge
Built-in microphone: You can make and receive calls through the portable Bluetooth speaker. Just one button accesses your phone's Siri or Google Assistant voice input
Bluetooth wireless speaker: SoundLink Flex pairs with Bluetooth-enabled devices like phones and additional Bose speakers within a range of 30 feet
Bose Connect app: App automatically updates the portable Bluetooth speaker with the latest software, allows you to customize settings, unlock product features, and more
Specifications
Connectivity
Bluetooth
Wireless Range
Up to 30 feet
Battery Life
Up to 12 hours per charge
Charging Interface
USB-C
Waterproof Rating
IP67
Additional Features
Floats, Built-in microphone, PositionIQ technology, Bose Connect app compatible
Pros & Cons
👍 Pros
- IP67 rating with floating capability means the speaker survives genuine water immersion — not just splash resistance — making it functional in environments that would destroy other portable speakers.
- PositionIQ orientation detection automatically corrects EQ for any mounting position, eliminating the degraded bass response common when portable speakers are laid on their sides.
- 12-hour battery life at moderate volume covers a full outdoor day without requiring a recharge mid-use.
- USB-C charging uses a universal connector standard, removing the proprietary cable dependency of older Bose portable speakers.
- Stereo pairing mode with a second SoundLink Flex enables genuine left/right channel separation for a wider listening experience.
👎 Cons
- Bose does not publish aptX or AAC codec support for this model, leaving Bluetooth audio quality dependent on SBC negotiation with non-Apple devices — a notable omission at this price point.
- 30-foot Bluetooth range is standard rather than exceptional; competing speakers at similar price points offer extended range in the 100-foot class.
- At this price tier, the speaker does not support multipoint Bluetooth connection (simultaneous pairing with two devices) without disconnecting and reconnecting when switching sources.
- The Bose Connect app is required to unlock certain features and receive firmware updates — functionality is partially gated behind a software dependency.
Frequently Asked Questions
What does IP67 waterproofing actually mean for the SoundLink Flex in real-world use?
IP67 means the speaker is rated for full submersion up to 1 meter for 30 minutes, plus complete dust ingress protection. In practical terms, it can survive pool splashes, rain, drop into shallow water, and beach sand without damage — and it floats, so retrieval from water is straightforward.
How does PositionIQ technology affect audio output?
PositionIQ uses internal sensors to detect the speaker's physical orientation — upright, on its side, face-down — and automatically adjusts the EQ and driver output to compensate. This means bass response and stereo imaging are optimized regardless of how the speaker is positioned or what surface it's resting on.
What is the Bluetooth range and which codecs does the SoundLink Flex support?
The rated wireless range is 30 feet (approximately 9 meters) in open conditions. The speaker connects via standard Bluetooth — Bose has not published specific codec support (aptX, AAC) for this model, so audio quality over Bluetooth is subject to the SBC baseline unless your device negotiates a higher codec.
How long does charging take, and what connector does it use?
The SoundLink Flex charges via USB-C (cable included). Bose rates the 12-hour battery life at moderate listening volumes — charging from depleted to full typically takes approximately 4 hours. The USB-C connection is current-standard and doesn't require proprietary cables.
Can the SoundLink Flex pair with a second unit for stereo output?
Yes. Bose's Party Mode and Stereo Mode allow pairing with a second SoundLink Flex — Party Mode plays the same audio through both speakers for volume, while Stereo Mode splits left and right channels for a wider soundstage. Configuration is managed through the Bose Connect app.
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