ITEM NAME:2 Channel 2.0 15W Audio TDA2030A Hifi Module Stereo Amplifier AMP Board TFP Descriptio n Material: PCB Color: green Size: 100 mm * 100 mm Parameter: power supply voltage: 9vac-15vac.(double ac 9v-15v). Power supply power: over 20W. Channel type: double channel. Output power: 15W+15W. Output impedance: 4-8 ohms. Product description: the output power: when the speaker impedance voltage + 12 v 8 ÃŽ © about 15 wx2 output power.The voltage range is + / -9 ~ + / -15v, double 12V power 20W or above (or 1.5a or above), if the voltage is increased (up to 15V) or if you like to listen loudly, please replace the large radiator according to the actual situation. Product Includes: 1 x Two 2.0-Channel 15 W +15 W TDA2030A hifi Stereo Amplifier AMP Board We offer you what you need! Double Channel Amplifier Board.1 x Two 2.0-Channel 15 W +15 W TDA2030A hifi Stereo Amplifier AMP Board. Output power: 15W+15W. Double Channel Amplifier Board. Channel type: double channel. We want to make sure you are happy with our item.