Amazon.com: TREBLAB HD-Max - Big Loud Bluetooth
- TAKE CONTROL WITH THE BUILT-IN MIC - The big speaker features a built-in microphone that lets users take hands-free calls. - HARNESS THE POWER INSIDE - The TREBLAB HD-Max's most outstanding feature is that it doubles as a portable power bank compatible with all USB devices. Specifications Wireless Technology: Bluetooth 5.0
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