TF/SD card control , support for USB (slave) function , which can achieve the card reader function
 Stereo Line-in input
IR remote
 Support 3X3 matrix key
Two controllable LED, support external amplifier mute function
 internal integrated power management
the internal integration 2x1W amplifier, supports dual-channel amplifier output directly ( 2x6 recommended European speakers, power is about 2x0.75W), Â with high-speed UART interfaces , commissioning and upgrading