The GA-101 adaptor cable allows you to connect two instruments into one 1/4" phone jack input on your instrument amplifier. This adapter will work with passive or active pickups found in most guitars as well as basses. Simply plug in your instruments and balance the volume using the normal volume controls on your guitar, bass or keyboard. The special circuit will combine the signals without the problems found using a typical Y-cable. This keeps interaction between the two instruments at an unnoticeable minimum and adjusts the volume to match what you would find with a typical single instrument. Contains one 1/4” mono phone plug on one end and two 1/4” phone jacks on the other end.