Quantity 1 Piece SpecificationSampling frequency 8 / 11.025 / 12 / 16 / 22.05 / 24 / 32 / 44.1 / 48kHz Supported File Format MP3 / WAV Adjustable Volume 30 class Playback Mode UART TTL serial control Baud Rate 9600bps Power 3.2 ~ 5.2VDC Dimensions & Weight (Main Product)Dimension 50x24x12mm Weight 6g Package Contents1x Serial MP3 Player module