1. You have a stereophonic signal source (TV audio frequency, player, mobile phone, PAD, computer, gramophone) to output to other equipment simultaneously (for example, the power amplifier, the speaker box, or the pre-amplifier) 2. This type of product to solve that 1 set of stereophonic input to distribute output 4 sets of stereophonic, 3. The output has volume adjustment function, output without sound amplification function, the output retains the original sound quality and volume same as the input. 4. Input and output adopt standard RCA interface 5. Simple installation: input and output, to be used inserted, convenient to install, input and output signal no consumption, then you can enjoy different listening experiences Interface: RCA Interface Power Supply: USB 5V Power Supply Input and Output Impedance: 10K - 50K Frequency Response: 20 - 20kHz. Distortion: Less than 0.002% Output Consumption: Less than 0.01dB Signal Gain: 0dB Signal-to-noise ratio S: 98dB Input and Output Interface: Standard RCA Interface Input Passage: 1 set of stereophonic input Output Passage: 4 sets of stereophonic output simultaneously (4 sets of output uniform volume adjustment) Material: Metal Color: Black Package Contents: 1 x Audio Signal 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.