1.Message: voice, music any mp3 and wav sound can program in the recorder 2.3-3600 secs sound available we specialize in sound module,greeting card sound module,voice module. 1. Message: voice, music and sound are available 2. Function: message recording(optional) 3. Voice recording duration: 3 to 270s for recording funciton 4. component: PCB, voice chip, a speaker, MIC, LED indicator and ...