... IC, batteries, switch, wiresSpeaker available: 40mm, 29mm, 27mm,21mm plastic or metal.Battery available: AA, AAA, AG13, AG10, ... or music more than 500 timesPCB available: customize size or our existed standard sizeMessage available: musics melodys, voices, songs ... audioMessage format: MP3 or WAVMessage duration: 1-180 secondsOEM item available: ideas, prototypes, artworksPassed testing: CE, ROHS, EN71 ...