Description: 【High Quality Material】: This 4 way headphone amplifier is made of metal material processing, which is durable and has a long service life. 【Excellent Audio Quality】: 4 Channels headphone power amplifier is a 4 channel volume independent control gain effect up to 20db,USB interface. 【Headphone Jacks】: Metal Stereo Audio Amplifier has 8 headphone jacks that do not interfere with each other, 4 3.5mm headphone jacks, and 4 6.35mm headphone jacks, which fully meet your needs. 【Features】: Mini Headphone amplifier, an ideal partner for HI FI headphones with line upgrades that do not interfere with each other, each signal is accurately amplified. 【Compact and Portable】: The multi channel headphone splitter has a compact mini size, easy to use, easy to carry, and can be widely used in stage and studio performances. Size Chart: 14.9cmx7.5cmx2.4cm/5.87inchx2.95inchx0.94inch Package Includes: 1 4 way headphone amplifier Note: Please allow slightly errors due to manual measurement and different monitors.