... 3.3pcs AG10 battery 4.Music time:6~300s 5.Sound chip used for cards Key Specifications/Special Features:Materials: ... CardsMusical chip with music playing or re-recordable function, ideal choice for your greeting cards.Applied for: greeting cards, gift package, food ... , voice, vibration, PIR, etcFunction: pre-recorded or recordable, with LED flash (optional)Messages: voice, music, and sound, customized ...