JBL Clip 4 Bluetooth speaker review: A new design and improved sound quality - CNET
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JBL Clip 3 vs Clip 4 - YouTube
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Amazon.com: JBL Clip 3, Black - Waterproof, Durable & Portable Bluetooth Speaker - Up to 10 Hours of Play - Includes Noise-Cancelling Speakerphone & Wireless Streaming : Electronics