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If calls are part of your use, confirm microphone and speakerphone support for the exact Bluetooth speaker. A speaker designed only for music does not necessarily provide a microphone, and a built-in microphone is not evidence of good conference-call performance.
A documented speaker example
The Bose SoundLink Flex owner guide documents call functions and use of its microphone with a connected mobile device. Check the generation and model before purchase; do not assume a similarly named SE or newer variant has identical features. This is a documented option, not an independently tested calling-quality result.
What to check for calls
Compare supported call controls, phone connection and how the microphone is used. Check the manual for the system you will use, including a laptop or conferencing app if relevant. Do not assume Bluetooth music playback proves support for every call application.
Portability and battery
Travelers and remote workers should compare size, weight, charging connections and documented runtime conditions. Continuous music estimates do not establish call runtime. Include cables and storage needs in the packed setup.
Sound and environment
For music, compare listening evidence and the intended room or outdoor setting. For calls, consider distance, background noise and where the speaker will sit. Check the exact unit's environmental limits; a water-resistant product does not establish reliable microphone performance outdoors or with attached cables.
Buying decision
Choose a model with documented calling support, then compare the connection, controls, size, price and warranty. If frequent meetings are the main job, compare a dedicated speakerphone.