Submic (Wireless Mic) EX-7900S *compatible with ED-7000 Sing Duets with your family friends today! - Ultra high band of 900MHz - Crystal clear sound by using noise reduction circuit. - Great reception range - Control : Speed, Pitch, Music Volume, Vocal Volume - Dynamic Range : 20 Ft - Power : 2 x AA Alkaline Batteries (not included) - Must have a Magic Sing to operate