... yourself at your side Material: PCB board, speaker, battery, press button, and recording IC Voice or music pre ... Product Description1.Material: PCB board(40X30mm), speaker(φ40mm), battery(3*AG-10)2.Pre-recorded/recording time: 3 to ... yourself at your side Material: PCB board, speaker, battery, press button, and recording IC Voice or music pre ... by yourself. MP3 sound module,USB sound clip,sound module