Led flash chip for greeting card, book, etc Custom sound and light color are accepted. Good sound effects. CE Led flash chip for greeting card1. Message: voice, music and sound are available.2. Pre-recorded duration time: 1s to 60s are available.3. Red, yellow, blue, green, jade and white LED colors are available.4. Components: voice ic, PCB board, speaker, LED lights and batteries.5. Slip switch ...