Note：This item comes with , please confirm the voltage of your area before purchasing. Description Compact 4-channel stereo headphone amplifierCan be used for up to four headphones at the same time i.e. for simultaneous listening of main mix with separate volume control. Comes with four powerful stereo amplifiers that deliver outstanding performance at any volume. Clear sound with ultra low-noise 4580 operational amplifiers that are used in 19" studio equipment. Features - Color: Black -Material:ABS - Size: 10.50X5.70X4.50cm/4.13X2.24X1.77in - Voltage: AC110- - Timbre data: stereo - Voltage: 12 (V) - Required software: stereo sound - Audio: stereo - 4 - channel stereo headphone amplifier is suitable for all types of headphone - 4 high power stereo amplifiers - You get the best sound quality even at high volume - Each channel is provided with an output level - The ultra low noise 4580 operational amplifier ensures timbre - Supply 12V dc power adapter with shipment - You can combine this super compact stereo earphone amplifier with any of four earphones - The HA400 contains four high-power stereo amplifiers that maintain maximum sound quality at maximum volume - The ultra low noise 4580 operational amplifiers have excellent audio performance, they are the same as the operational amplifiers on full-size audio equipment, and a 12-volt dc adapter is available - If you want to track more than one musician at a time, or if each member of the group wants to hear playback, you need system.The compact, flexible HA400 can drive up to four pairs of headphones and up to four separate volumes Package list: 1 x Amplifier