This is a Switch Harness for Futaba Radios with J style connectors. The switch harness connects the receiver battery to the receiver by way of an on/off switch. It also allows you to charge the receiver battery without removing it from the model. INCLUDES: One Switch Harness w/ J Connectors and Charge Cord. COMMENTS: To mount the charge cord and on/off switch into the side of the airplane for recharging, use GPMM1000. ir/jl