Feature:1. Independent Design: 4 in 1 out RCA stereo mixer is designed with 4 independent isolation, no common ground to prevent interference, clear and clean sound bottom.2. Amplified Circuit Design: The 4 in 1 out RCA stereo mixer's 4 inputs are designed with an amplified circuit to increase the volume and enhance the listening experience.3. Multi Use: 4 in 1 out RCA stereo mixer is designed with amplification circuit to increase the volume and enhance the listening experience.4. Input Port: CD player, player, computer and record player and other sound equipment connected to the RCA double lotus input port.5. Output Port: 4 in 1 out stereo mixer RCA dual lotus output port connected to headphones, earphones, amplifiers, speakers, etc.6. Cautions: 4 in 1 out RCA stereo mixer's output port is not allowed to be connected to sound equipment to avoid damage to the playback device.Specification:Item Type: 4 in 1 Out RCA Stereo MixerMaterial: Aluminium AlloyOutput Signal: 1 Way Stereo SignalOutput Impedance: 600ΩFrequency Response: 20Hz-20kHzSignal to Noise Ratio: Greater Than 100db (20Hz-20kHz)Harmonic Distortion: 0.04% Typically.Package List:1 x Mixer1 x Instruction Manual1 x Adaptor1 x Power Cord