26mp3 PlayerInsert battery into the player1. Slide the battery door by following the direction of arrow.2. Insert a “AAA”(UM4) battery with polarities corresponding to the indications in the compartment.3. Replace the door to the battery compartment.Note: This unit may temporarily cease to function if subjected to electrostatic disturbance. To resume normal operation,it may be necessary to cycle the power off and back on or to remove and reinstall the batteries.General Controls- Press once to turns the unit on. In play mode, press once to starts and pause music playback.- In stop mode, press once to turn off the unit. Press once to stop music playback.- Skips to the previous song or the beginning of the current song. Press and hold to scan backwards.-Skips to the next song. Press and hold to scan forward.LOCK - Slide the switch to lock or unlick the keys of the playerHeadphones Jack - Insert headphones here.(USB port) - Use the USB port to connect to the Audio System.USB lock button - Press and hold and push the USB connector out form the unit.VOL + / - - Increases and decreases the volume level.M - Selects among playback options. (repeat one, repeat all, random playback, repeat random playback)DSP - Selects among DSP modes (Flat, Bass, Pop, Rock, Jazz)