inputs.text: bad design - several design flaws biggest battery cover cannot hold battery securely sometimes battery lose contact pins unit no longer power place piece paper battery battery cover makes situation better time time battery still lose contactsometimes unit freeze no matter press buttons not respondif use line mode plug wire without connecting source static noise noticeableif accidentally hit record button save recording unit keep playing recording find way delete recordingthe sound quality kind ok high pitchthe user interface gad not intuitive slow takes second respond button pressing cannot find way go next folder easily put songs folder sd card