... AG10 battery 4.Music time:6~300s 5.Sound chip used for cards Promotion Light sensor music recording greeting card1. ... re-recordable function, ideal choice for your greeting cards.Applied for: greeting cards, gift package, food package, promotional package, etc ... , with LED flash (optional)Messages: voice, music, and sound, customized sounds are availableRecording duration: 6seconds to 30 seconds, ...