5 sets stereophonic select input (each one set input with switch, to start at the same time and mix together to input, also to close one set independently). 5 sets stereophonic output at the same time (each one set output with volume switch adjustment). Solve the problem that multiply equipment input and multiply equipment output at the same time. 5 sets output sound at the same time and amplify gain +15dB. Simple installation: input and output, to be used once inserted, convenient to install, input and output signal no consumption, then can enjoy different hearing experience. Interface: interface Power supply: USB 5V supply power Input and output impedance: 10K ohm - 50K ohm Frequency responding: 20 - 20kHz. Distortion: less than 0.002% Output consumption: less than 0.01dB Signal gain: +15dB Signal-noise ratio S: more than 98dB Input and output interface: standard interface Input passageway quantity: 5 sets stereophonic select input (5 sets input to start at the same time and mix together to input, also to close one set independently) Output passageway: 5 sets stereophonic output (each one set output with volume adjustment) Control switch: input and output adopt self lock switch, accurately select manually shift Output select shift passageway: 5 passageways Colour: black Material: metal Package Contents: 1 * Audio signal mix splitter Only the above package content, other products are not included. Note: Light 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.