JBL offers its JBL Go Portable Mini Bluetooth Speaker in eight colors (Black pictured) for $39.95. Coupon code 20JBLGO drops it to $19.99. With free 2-day shipping, that's $4 under our April mention, the best deal now by $12, and the lowest total price we've seen. It features Bluetooth 4.1, a rechargeable battery, 3.5mm auxiliary input, USB charging, and speakerphone. Deal ends June 12.

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