1、1 input 4 output audio splitter: 1 set of stereo input, 4 sets of simultaneous output with master volume adjustment. 2、You have one stereophonic signal source (eg. TV audio frequency, player, video game, mobile phone, tablet, computer, gramophone), and want to output to other equipment at the same time (eg. power amplifier, loudspeaker box, preamplifier). 3、Lossless output; output without sound amplify function, the output keeps the tone quality and volume same with the input. 4、2 types of interface for option: standard RCA interface or 3.5mm interface. The 3.5mm interface type contains a 3.5mm male to male cable when shipped. 5、Compact design and solid metal shell; the compact size suits for any system; USB 5V powered, 1m (3.28ft) USB cable is provided. This product is designed for solving the problem of distributing 1 set of stereophonic input to 4 sets of simultaneous output. You can choose RCA interface or 3.5mm interface according to practical needs. Features: 1 input 4 output audio splitter: 1 set of stereo input, 4 sets of simultaneous output with master volume adjustment. You have one stereophonic signal source (eg. TV audio frequency, player, video game, mobile phone, tablet, computer, gramophone), and want to output to other equipment at the same time (eg. power amplifier, loudspeaker box, preamplifier). Lossless output; output without sound amplify function, the output keeps the tone quality and volume same with the input. 2 types of interface for option: standard RCA interface or 3.5mm interface. The 3.5mm interface type contains a 3.5mm male to male cable when shipped. Compact design and solid metal shell; the compact size suits for any system; USB 5V powered, 1m (3.28ft) USB cable is provided. Note:Size and color may be slightly different because of manual measurement and different light conditions. Thanks for understanding. Specifications: Interface: RCA Interface/ 3.5mm Interface (Optional) Color: Black Material: Metal Power Supply: USB 5V Input and Output Impedance: 10KΩ-50KΩ Frequency Response: 20Hz-20KHz Distortion: <0.002% Output Loss: <0.01dB Signal Gain: 0dB Signal to Noise Ratio (SNR): >98dB Input Channel: 1 set of stereophonic input Output Channel: 4 sets of stereophonic output at the same time (4 sets of output unified volume adjustment) USB Cable Length: about 100cm / 3.28ft Item Size: RCA Interface: 95 * 53 * 38mm / 3.74 * 2.09 * 1.50in 3.5mm Interface: 87 * 52 * 22mm / 3.43 * 2.05 * 0.87in Item Weight: 150g / 5.29oz RCA Interface: 210g / 7.41oz 3.5mm Interface: Package Size: 10.9 * 8.6 * 5cm / 4.29 * 3.39 * 1.97in Package Weight: RCA Interface: 240g / 8.47oz 3.5mm Interface: 220g / 7.76oz Package List: 1 * Audio Signal Distributor 1 * USB Cable (100cm) 1 * Audio Signal Distributor 1 * USB Cable (100cm)