Product description:Product Name: 2.1 Subwoofer Digital AmplifierAmplifier chip: TPA3116D2Output power: 2 x 50W+100WChannel: 2.1 channelColor: greenmaterial: plasticImpedance: 4 OhmPower supply: DC15-25VCurrent: ≥5ABecause the power amplifier board itself has 12V voltage regulator power supply, it does not support 12V power supply or battery power supply, the minimum power supply is 13.6V, 15-25V power supply is recommended, pay special attention, do not exceed 25V maximum voltage!!!Package Contents:1 x Amplifier Audio BoardOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.