Power source: No power supply required, Direct plug-in and direct use Quality: Full metal shell design Input and output impedance: 10KQ - 50KQ Frequency response: 20-20kHz frequency Insertion loss: Less than 0.01dB Input gain: 0dB Signal-to-noise ratio S: 98dB Input interface: standard 3.5mm/6.5mm Interface output interface: standard 3.5mm/6.5mm Interface input channel number: six Stereo input and output channel number: six One stereo output with volume adjustment function Control switch: 6-position precise selection Manual switch switching channel: 6 channels Colour:Black Material:Metal Package Contents: 1 x Switcher Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.