Description:Metal housing enables this sound mixer to achieve strong wear resistance and impact resistance to ensure long term use.This sound mixer is practical, which can provide you with four stereo RCA inputs, one stereo RCA output and four independent and adjustable 100K ohm potentiometers.Made of high quality metal material, this product is firm and durable to use.The length of the product is 8.3cm, the width is 5.2cm, and the height is 3.8cm.It is a stereo four-way passive mixer for extended control tuning, mixing instrument, CD 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.Item Name: Sound MixerMaterial: MetalInput Impedance: 10K ohm to 47K ohmOutput Impedance: 2.5K ohm to 10K ohmGain: -12dB (Max.)Features: 4 Channels, Volume Control, Low NoiseSize Details: 8.3cm x 5.2cm x 3.8cm/3.27" x 2.05" x 1.5" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Sound Mixer1 x User Manual