MP3 file format:support all bit rate 11172-3 and ISO13813-3 layer3 audio decodingSample rate support (KHZ): 8/11.025/12/16/22.05/24/32/44.1/48support Normal, Jazz, Classical, Pop, Rock and other sound effectsUART interface: standard serial port, TTL level, baud rate can be setInput voltage: 3.2V-5V ..