Features: 1. The compact 4-channel stereo headphone amplifier can be used for up to four headphones at the same time, that is, listen to the main mix at the same time with separate volume control. 2. Equipped with four powerful stereo amplifiers, which can provide excellent performance at all volumes. 3. Clear sound, ultra-low noise 4580 operational amplifier for 19-inch studio equipment. 4. Individual volume control for each channel 5. 1 input 6.3 Toman Mm stereo connector Description: 1. Input: Impedance 100 2. Output: 6.3 mm stereo connector 3. Output Impedance: 80 Plug Type: EU Plug, it is applicable to Indonesia, Germany, France, Italy and so on Voltage: AC100-240V Size: 103 x 46.5 x 57.2mm (Width x Height x Depth) Material: Iron Color: Black Package Contents: 1 x Headphone Amplifier 1 Adapter Only the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is +/- 1-3 cm. With the concept of customer first, we provide you with 24/7 customer service. No matter where you are or what problems you encounter, we will solve them for you as soon as possible to ensure your shopping experience is worry-free.