Correct plug for building your own customer charge and battery testing cords for the 4.8V JR DX8 transmitter. Presumably any subsequent JR 4.8V (4 cell) TX's will use this plug.
NOTE: Does not fit the Spektrum DX5e or DX6i. Use charge cord part number: RRCCGCDTXJR96 or connector part number: RRCTXPP2.1MJR