1、Universal to Use: The 4 channel stereo headphone amplifier is designed to work with all types of headphones, thus providing maximum flexibility. 2、Outstanding Sound Performance: The 4 channel headphone amplifier's ultra low noise 4580 operational amplifier ensures excellent sound performance. 3、Independent Output Levels: The headphone amplifier's 4 channels are set at independent output levels to meet a wide range of listening needs. 4、High Power Stereo: 4 high power stereo amplifiers ensure maximum sound quality even at maximum volume. 5、Independent Volume Control, Application: The volume of each output channel can be controlled independently. Suitable for studio and stage applications. Item Type: Headphone Amplifier Material: Iron Shell Type: 1/4Inch TS Connector, Stereo Impedance: 100kΩ Headphone Output: Type: 1/4Inch TS Connector, Stereo Impedance: 80kΩ 1 x Headphone Amplifier 1 x Instruction Manual 1 x Adapter