Non-powered audio switch solves the complex line plugging/unplugging operation. It can be used either for one to two speaker systems or two sound sources to one speaker system. Equipped with 3.5mm connections, and 2-position push-button switch. Delivers sound without ground noise and loss to the sound quality. No power supply required, simply plug and play. Note: If there are two stereo signal sources(such as TV audio, MP3 player, CD player, video game, mobile phone, tablet, computer, record player), the output shall hook up to the power amplifier or active speaker. Specifications: Jack Type: 3.5mm Power Supply: no power supply, plug in and use directly Input and Output Impedance: 10kΩ - 50kΩ Frequency Response: 20-20 kHz Distortion:Less than 0.002% Insertion Loss:Less than 0.01dB Signal Gain: 0dB SNR S: 98dB Input Interface: standard 3.5mm interface Output Interface: standard 3.5mm 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 Color:Black Material:Metal Package Contents: 1 * Audio selector 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.