ITEM NAME:PAM8406 5Wx2 Digital Speaker Amplifier Board with Volume Potentiomet DC 3~5.5VMO.1pcs x PAM8406 5Wx2 Digital Speaker Amplifier Board. Adding a import 1000UF solid filter capacitor, Effectively solve the problem when used USB as power cause alternating current hum. Max Output Power: 5W x 5W (Load 2 ohms).