Now you are the composer and conductor of your own symphony with The Virtual Composer Kit! As a conductor who uses a baton to send signals to the orchestra a musical performance is begin directed. In theory, The Virtual Composer Kit works the same way. Depending on the height of your hand/object(baton) over the ultrasonic sensor (orchestra), a frequency is passed along to the buzzer (musical instrument) where different sound tones are created. Kit uses a preprogrammed Microcontroller PIC. Requires 9V battery (not included). Size of PC board is 2" X 2.5". Complete with all parts, PC board and instructions. Requires Soldering. Skill Level 2.