... ,promotion,invitation,etc. CE,RoHS Good quality,price Voice recorder paper greeting card with cutomers' artwork and audio files,for fetivals ... > Battery life:110 -350 times base on recording time duration> Speaker for chord tone: D36mm,8ohm,0.5W,plastic case Buzzer ... according to request> Sound file,artwork,size and shape of paper card could be customized.> Could be used for different occasions ...