HIFI and largely compatible: The CD player offers high-resolution, lossless sound. Largely compatible with CD, MP3, CD-R, CD-RW, CD-DA, MPS, WMA audio files, more perfect Sound makes an indispensable device for avid listeners. AUX connected to all audibledevices 3.5mm audio input. NOTE: Please check if your disc is spinning or not. If your disc format is not compatible, it will not work Improved CD player: CD and TF card playback There are two modes to choose from. The player has various modern functions. ASP: anti-shock system to prevent CD playback from being interrupted in the event of vibrations; 5 sound effects: BBS, JAZZ, POP,ROCK, ORIGINAL; 4 repeat functions: A-B repeat and repeat one and repeat all and play in random order Portable Design: Handy small music CD player with classic black color, smooth appearance with perfect LCD display; Adopts a professional intelligent digital noise reduction chip, which ensures a high audio experience qualified; The warmest gift for musiclovers, language learners, pregnant women, families and children Easy to use: on the top, the disc player has LCD display functions and buttons for playback functions; You can easily adjust the volume and previous / next; Keep the button pressed to avoid accidental touch Keys. Note: Please check on which side the "HOLD " switch is switched on, make sure that the " HOLD " switch is in the " OFF " position before switching the device on