1.Insert the mini plug into the headphone jack of you player. 2.Turn cassette player on and turn volume to the lowest position. 3.Insert the adapter into cassette deck as you would an cassette, press play and adjust to desired volume. 4.Eject adapter when not in use. ( note: Portable player must be ''on'' to eject adapter.) 5.Wire can be re-positioned for cassette loading type..syi