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Product DescriptionThe Cobra BT300 Bluetooth speaker is easily paired with any Bluetooth-enabled device. The mini speaker has a 3.7V built-in lithium-ion battery, so it can be used without connecting to a power supply. BT300 speaker features easy power and volume controls, plus a multi-button for convenient answering of incoming phone calls. Provides up to 9 hours of play time on a full charge. Compact size lets you take your favorite tunes anywhere. Meets IP55 dust and waterproof standards.