2 in 1 out or 1 in 2 out audio source signal selection, switcher, computer, speaker, audio source, switcher, interface, lossless transmission 1. No need for power supply design, direct plug and direct use, no loss of input and output signals, switching transmission, 2. This product is mainly used to select a common output device for switching stereo signal input. If there are two stereo signal sources (such as TV audio, MP3 player, CD player, video game, mobile phone, tablet, computer, record player), the device needs to output to the power amplifier or active speaker. 3. Two sets of stereo source switchers solve the complex line plugging operation. As long as the required input device signal source is uniformly connected to the switcher, it can be easily . 4. interface design is used for product input and output standards, and the switch is designed with manual push-button switch of precise 2 positions. [Product parameters] Power supply: no power supply, plug in and use directly Input and output impedance: 10 k - 50 k Frequency response: 20-20 kHz Distortion: Less than 0.002% Insertion loss: Less than 0.01dB Signal gain: 0dB S: more than the 98dB Input interface: standard interface Output interface: standard interface Number of input channels: 2 stereo input signal sources Number of output channels: 1 channel stereo output Control switch: Accurate selection of gear 2, manual switch Net weight: 0.14kg colour:black Material:metal size:Product size: length 69mm X width 43mm X height 39mm Package Contents: 1 x Audio Switcher 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.