Product description 1No need for power supply design, direct plug and direct use, no loss of input and output signals. Output with independent level volume adjustment function 2.This product is mainly used to select a common output device for switching various 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 selected. 4.RCA 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 Material: all metal case design Input and output impedance: 10 k - 50 k Frequency response: 20-20 kHz Distortion: < 0.002% Insertion loss: 98dB Input interface: standard RCA interface Output interface: standard RCA 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 Gross weight after packaging: 0.16kg Product size: length 69mm X width 43mm X height 39mm Package size: length 83mm X width 73mm X height 51mm