The original grey ghost headphones from detector pro are an old favourite. These headphones are made with adjustable muff arms that have been padded for comfort & soft muff pads that seal out external noise but comfortable & do not press on the external ear & cause discomfort. It has a single volume knob that adjusts the volume equally on both sides of the headphones & a bypass switch to shut off any noises whilst digging. It has a 1/4" jack it's operating range is 150 ohms. This higher Ohms allows smaller almost inaudible sounds to be clarified & lifted which is an advantage. These headphones are ideal for gold or treasure detectors .