Get all of the great features as the HA2 or HA7 in this economical alternative. Operates in 1/8 inch stereo, 1/8 inch mono, 1/4 inch stereo or 1/4 inch mono modes, which means you can use it in almost every kind of audio source. And all of these features are packed for you at a very affordable price. Refresh kit available includes a replacement reclose-able storage bag and two new ear cushions. Impedance: 170 Ohms; Frequency response: 18-20k Hz. Cord: 2 meters.