... small sound chip, waterproof tracking chip, waterproof rfid chip, recordable waterproof chip, sound chips Sound module with waterproof function, idea choice ... gifts, etc.Activated: by pushFunction: pre-recorded, with LED flash (optional)Messages: voice, music, and sound, customized ... more if requiredComponents: PCB, IC, speaker, microphone, LED indicator, batteries, wire harness, switch, more or less ...