Features:5V-12V power supplySupport folder selection playbackSupport call / recording (external recording). Recording shall be operated in TF mode or USB mode.(press mode key to start recording, press mode key again to cancel recording and play recording file; in recording mode, you need to connect a storage device USB disk or tfcard;)Support USB / TF / Bluetooth / radio / aux automatic switchingSupport power-off memory function: remember songs and volume before power-offThe product has a power amplifier, supports balanced output, and stereo power is 2 * 25W.Support mp3 / wma / WAV / APE / FLAC version of song decodingSpecifications: Color:BlackQuantity:1PCSize:As Picture ShowsPackage Include:1PC Bluetooth MP3 Player Decoder BoardNote: 1.Please allow 0.1-0.3cm differences due to manual measurement, thanks.2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.