This is a Charge Receptacle for Futaba J FM, Cirrus Fm, Radio Systems. This mounts into the side of aircraft fuselage. The charge cord from the switch fits into one side and the male charging plug fits into the other side. FEATURES charge receiver batteries or check their voltage without removing the wing fits fuselage sides up to 1/2" thick INCLUDES One Charge Receptacle for Futaba J Connectors One Inner Mounting Plate One Outer Mounting Plate One Receptacle Cover Two Mounting Screws