Icstation TDA2030 2X15W Stereo Audio Amplifier DIY Kits Electronics Soldering Practice Suite Equipped with two TDA2030A chips ensure high amp power 15W+15W stereo output output AC / DC 9V-12V input, 4-8  impedance output Integrated fewer but essential components,high sound fidelity, low distortion Perfect for electronics fans or DIY speaker enthusiastShip it out by USPS with tracking information and 7-17 days delivery time usually