1. No need for power supply design, direct plug and use, no loss of input and output signals, seamless switching transmission. 2. This product is designed to switch between two stereo signal sources (such as TV audio, MP3 player, CD player, video game console, mobile phone, tablet, computer, or record player) to a common output device such as a power amplifier or active speaker. 3. Dual stereo source switcher eliminates the need for frequent cable swapping. Simply connect both input sources to the switcher for easy and quick selection. 4. Standard audio interfaces for input and output. Equipped with a precise 2-position manual push-button switch. Power supply: None required, plug and play Frequency response: 20 Hz - 20 kHz Distortion: Less than 0.002% Insertion loss: Less than 0.01 dB Signal gain: 0 dB Signal-to-noise ratio (SNR): Greater than 98 dB Input channels: 2 stereo inputs Output channels: 1 stereo output Control switch: Manual 2-position selector switch Net weight: 0.14 kg Color: Black Material: Metal Dimensions: 69 mm x 43 mm x 39 mm Package Contents: 1 x Audio Source Signal Selector Note: The package includes only the items listed above. Other accessories are not included. Note: Slight color variations may occur due to lighting and display differences. Measurement error allowed within +/- 1-3 cm.