Customized design and time duration With LED lights in card For gift,promotion,invitation,etc. CE,RoHS Good quality,price Voice recorder paper greeting card with cutomers' artwork and audio files,for fetivals,holiays as gift,promotion and advertisement > Time duration of audio file: 6s to 60s,or more,could be customized> Audio file can be pe-recorded,with OTP or Mask chip for choice(according to ...