Welcome to our store！</br> 1、4 in 1 Out Mono Mixer: Ultra compressed 4 channel input and 1 channel output line mono mixer 4580 operational amplifier with superior sound performance. 2、Independent Adjusting Knob: Individual volume controls enable each listener to determine their own volume level via a dedicated output volume control knob. 3、Great Performance: Even at maximum volume, this metal 4 channel headphone amplifier can provide the highest sound quality for each earphone. 4、Low Noise: Enjoy a low noise monitor distribution and music system. The ultra compact headphone amplifier is easy to carry and can be used anytime, anywhere. 5、Metal Material: The shell of this headphone amplifier is made of premium metal, strong and stable, wear and fall resistance, can be used for a long time. <p class="wang-edit-text"><p class="wang-edit-text"> Item Type: Headphone Amplifier Material: Metal Weight: Approx. 312g/11.0oz Color: White Voltage Input: AC 100V to 240V, 50/60Hz <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x&nbsp;Headphone Amplifier 1 x Adapter 1 x Specification Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>