... Can record music by yourself at your side Material: PCB board, speaker, battery, press button, and recording ... the message by yourself. Detailed Product Description1.Material: PCB board(40X30mm), speaker(φ40mm), battery(3*AG-10 ... Can record music by yourself at your side Material: PCB board, speaker, battery, press button, and recording ... message by yourself. MP3 sound module,USB sound clip,sound module