Features: Brand new and high quality Wide operating voltage range: 12-24V, suggestion 12V. Speaker power: 20W, suggestion 15W speaker is the best. Low static power consumption, the quiescent current of approximately 2MA, ideal for battery-powered. Low power consumption, updated within the chain gain adjustable,large supply voltage range, fewer external components and total are widely used, widely used tape recorders and radios being. On-board volume control potentiometer clockwise to increase the volume,with power indicator light. Specifications: Output Power: 20W Voltage: 12-24V DC voltage: DC12V 2A Speaker recommendation: 2.5-4 inch 5-20W Recommended: 12V power 15W 2A or above Board size: 65 x 55mm Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x TDA2030 Mono Audio Power Amplifier Board