... , etc...When you open the card play sounds.Slide switch Module Size: 24x40mmSpeaker size:Dia40mmBattery:2 or 3pcs of L1131 ... pull-tab (slide), light, voice, vibration, PIR, etcFunction: pre-recorded or recordable, with LED flash (optional)Messages: voice, music, and sound, customized sounds ... PCB, IC, speaker, microphone, LED indicator, batteries, wire harness, switch, more or less for different items