This is a Crosley Rondo Retro Style Bluetooth Speaker CR3039A-TN. It is a rectangular green portable speaker system with dimensions of 4.5 inches in length, 3.5 inches in height, and 3 inches in width. It weighs 10 ounces and features Bluetooth connectivity and a USB audio input. The speaker is designed in a vintage retro style by Crosley, a well-known brand in consumer electronics.
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