3.5 x 8.5 x 3.4 inches

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Wirelessly connect up to 2 smartphones or tablets to the speaker and take turns enjoying powerful sound
Battery type: Lithium ion Polymer 27Wh (Equivalent to 3.6 volt, 7500 mAh), battery charge time: 4 hours (5V/2.3A). Music playtime up to 20 hours (varies by volume level and audio content)