... folded 43.Full color print4.Battery:2-3pcs of AG10 button batteries5.The sound plays when the enviromental light changes6. ... .2. Peel off paper backing from module and push button and stick into place.Promotion music greeting card for giftFunction ... tab (slide), light, voice, vibration, PIR, etcFunction: pre-recorded or recordable, with LED flash (optional)Messages: voice, music, and sound, customized ...