Crank up your next mini wireless audio project with this 30W x 2 digital Bluetooth 4.2 amplifier board with IR remote. It has a built-in USB port for playing digital music and smartphone charging. Create endless DIY small audio projects with this 4.2 Bluetooth stereo 60W amp board with USB flash drive digital media player. Its small size takes up very little space and has a preinstalled volume control, thumb drive digital music player, and 3.5 mm line-in jack making it easy to design projects without using a smartphone.