Bose
Bose 865983-0800 SoundLink Flex Bluetooth Waterproof Speaker - Cypress Green
★★★★★
USB-CIP67
IP67-rated portable speaker delivers room-filling Bose sound with 12-hour battery life that floats when it falls in water.
$149.00*
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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-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 Position Qtechnology 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 – ideal 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 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
BOSE CONNECT APP: App automatically updates the portable Bluetooth speaker with the latest software, allows you to customize settings, unlock product features, and more
Charging time: approximately 4 hours when using the original cable.
Specifications
Speaker Type
Portable Bluetooth Speaker
Transducer
Custom-Engineered with Dual Passive Radiators
Bluetooth Version
5.1
Waterproof Rating
IP67 (Dust-Tight, Submersible to 1m for 30 min)
Battery Life
Up to 12 Hours
Charging
USB-C, Approximately 4 Hours
Built-in Microphone
Yes
Voice Assistant Support
Siri, Google Assistant
Dimensions
2.06"D x 7.93"W x 3.56"H
Weight
1.3 Pounds
Color
Cypress Green (Limited Edition)
App Support
Bose Connect App
Special Features
PositionIQ, Floats in Water, UV/Corrosion Resistant
Pros & Cons
👍 Pros
- Custom Bose transducer produces clear mids and surprisingly deep bass for a speaker measuring just 7.93 inches wide.
- IP67 seal and floating design make it genuinely immersion-proof, not just splash-resistant like many competing portables.
- PositionIQ auto-adjusts EQ based on physical orientation, eliminating the need to manually tweak settings when repositioning.
- 12-hour rated battery life at moderate volume provides full-day use on a single USB-C charge.
- Corrosion-resistant and UV-resistant materials extend the lifespan in outdoor environments where sun and moisture cause premature degradation.
👎 Cons
- 4-hour charge time via USB-C is slower than competing speakers in this class that charge fully in 2.5-3 hours.
- No 3.5mm aux input means you cannot use this speaker with non-Bluetooth sources like older MP3 players or wired mixers.
- At 1.3 pounds, it is noticeably heavier than ultraportable competitors, which adds up in a loaded daypack.
- Does not support aptX or LDAC Bluetooth codecs, so Android users with high-res audio libraries will not get lossless transmission.
- Mono speaker cannot produce true stereo without purchasing a second unit.
Frequently Asked Questions
What does the IP67 waterproof rating actually protect against?
IP67 means the SoundLink Flex is fully sealed against dust ingress (rated 6) and can survive immersion in up to 1 meter of freshwater for 30 minutes (rated 7). It also floats, so pool or lakeside drops are recoverable. It is not rated for saltwater or pressurized water jets.
How does PositionIQ technology work and why does it matter?
PositionIQ uses an accelerometer inside the speaker to detect its physical orientation — upright, on its back, or hanging from the utility loop. The DSP automatically adjusts the EQ profile for each position so you get optimized sound whether the speaker is standing on a table or clipped to a backpack.
Can I pair two SoundLink Flex speakers together for stereo sound?
Yes. Through the Bose Connect app, you can pair two SoundLink Flex units in either Party Mode (both play the same mono signal for more volume) or Stereo Mode (left and right channels separated across two speakers for a wider soundstage).
What Bluetooth version does this speaker use and what is the effective range?
The SoundLink Flex uses Bluetooth 5.1 with a rated range of approximately 30 feet (9 meters) in open environments. Walls and obstacles will reduce this range. It supports SBC and AAC codecs but does not support aptX or LDAC.
How long does a full charge take and what is the real-world battery life?
A full charge takes approximately 4 hours via the included USB-C cable. Bose rates battery life at up to 12 hours, which is achievable at moderate volume levels (around 50%). At higher volumes, expect closer to 7-9 hours depending on content and environment.
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