Item Type: Stereo Headphone Amplifier Material: Metal Model: HAM 1000 Sound Interface: 3.5mm Input Impedance: 10K Output: 10160 Gain: 14dB Operating Voltage: DC 12V Plug Voltage: 100240V Package List 1 x Sound Splitter 1 x Sound Cable 1 x Power Adapter 110 CHANNEL: Stereo headphone amplifier with 10 independent stereo sections, 1 input to 10 channel outputs. 2VOLUME CONTROL: Each output has a separate volume button for individual control of different headphones or speakers. 3DC 12V: Stereo sound amplifier is equipped with a 12V 1A power adapter to provide you with a great sound experience and a metallic feel. 4METAL HOUSING: Stereo headphone amplifier splitter housing is made of metal for portability, durability and long life. 5PROTECTION: Stereo sound amplifier splitter has protection features such as overheating and overvoltage protection, so you don't have to worry about potential safety hazards when using the headphone amplifier.