INDUCTION SPEAKER, NO NEED FOR BLUETOOTHJUST CONTACTPower supply: built-in lithium batteryBattery capacity: 1000 mahDuration: 8 hoursBox material: woodAppearance size: 163mm*123mm*58mmProduct weight: 0.3 (KG)75 db or higher SNRFrequency range: 100HZ-20KHZOutput power: 4 Ω 3 watts