5-button Push Musical Sound Module REQUIRES SOFTWARE (provided FREE), and SOFTWARE ONLY WORKS WITH PC, Windows 7 or Windows XP (will not work with other versions), NOT with MAC either. Unit has 5 individual buttons, and each button can play different music/voice message Life cycle: plays 300 to 350 times on average (replace the batteries and unit will continue to play) Maximum play duration: can be re-recordable up to 418 seconds (@ 16kHz sampling rate) Play type: Push button. It will start playing by pressing the each buttons