If you want a good portable speaker, the Ultimate Ears Wonderboom 4 is a great choice. It's 49% off at Amazon now.

The Ultimate Ears Wonderboom 4 speaker was $99.99, but now it's $51.44. You save $48. This is a very good price.

We like the Ultimate Ears Wonderboom 4 speaker. It's one of the best portable speakers for under $100. It sounds good and is loud.

The speaker is strong and can fall from 5 feet without breaking. It's also waterproof and can float in water for 30 minutes. The battery lasts 14 hours.

If you like the Ultimate Ears Wonderboom 4, buy it now and save money at Amazon.

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It's about Bluetooth music.