Description: brand new and high quality Feature: Mini passive stereo mixer is a stereo four-way passive mixer for extended control tuning, mixing instrument, C-D player, tape player, computer, mobile phone, tablet and so on. No battery or other power source required. The device can also be used as 1 In 4 Out stereo distributor clockwise to adjust the volume. OUTPUT: is used to connect RCA jack to mixer output or other output devices. IN 1-4: controls the signal level from input 1-4. 4 groups of stereo RCA input and 1 group of stereo RCA output, Four independently regulated 100K ohmic potentiometers. Specifications: Item Type: Sound Mixer Model: CX400 Channel: 4 channels Input impedance: 10K ohms to 47K ohms Output impedance: 2.5K ohms to 10K ohms Gain: -12dB MAX Material: ABS+Metal Size: 83x52x38mm Color: Black Quantity: 1 PC Note: Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x Passive Mixer