Mute: press to change between mute and mute off, Vol up: press, Menu: works as your ipod menu button – Earthquake Sound IQ-52R User Manual
Page 9: Vol down: press to decrease the volume, Menu up: works as your ipod menu up button, Enter: works as your ipod enter button, Menu down: works as your ipod menu down button, Ipod: press to select ipod input, Rca: press to select rca input, Aux: press to select aux input
