CP273S Portable design Integrated audio player for your MP3， MP4， mobile phones， computers Mini digital audio with unique appearance and variety colors Host Function: Supports TF card USB flash drive USB 2.0/1.1 Build-in RTC， support time， calendar and clock Audio Format: MP3， WMA and WAV Music Mode: SRS， WOWHD， classic， pop， jazz， rock Synchronously display Output Power: RMS 6W THD=10% Frequency Response: 150~1800Hz SNR: 85dB Power Supply: Built-in Li-ion battery， DC 5V external power or USB cable