Features: The input connection have a locking structure. Just press the label next to the bottom mounting connectors to release the cable at end;Experiences studio quality sound on the go with our portable 3.5mm headphone amplifier Featuring a small and durability metal build, this device boasts volumes control knob for personalizes sound and high fidelitys output for clearly sound. Suitable for audiophiles, musicians, and sound engineers, this amplifier caters to anyone seekings improved listenings experience with professional equipment. Whether in a recording studio, home, or during live performances, this amplifier ensures your headphones deliver the best sound. With its secure locking hifi input, never worry about accidental disconnections; simply enjoy uninterrupted, better sound quality with every use. Specifications: Component:Metal Size:Approx.96x31.5x26mm/3.77x1.24x1.01inch 3.5mm Interfaces Package Includes: 1pc 3.5mm Adapter 1pc 6.35Plug note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.