Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si [Analog Audio Extender]Extend your RCA or 3.5mm stereo audio signal up to 500M over Cat5e/6 UTP cable. use oxygen-free copper CAT6 cable to signal integrity.(Note: CAT6 cable wire sequence must be 568B) [Audio Converter]The receiver can output both RCA and 3.5mm stereo audio signals at the same time. note that the transmitter can only transmit RCA or 3.5mm stereo audio signals and cannot transmit both audio sources at the same time. [Pure transmission]Long distance transmission using differential digital signals through technology to avoid interference and eliminate noise. [Plug and Play]Easy to use, no driver installation required Plug Type:EU Plug,it applies to Indonesia, , , , and so on Colour: Black Material: aluminum alloy Package Contents: 1 x Analog Audio Extender Transmitter 1 x Analog Audio Extender Receiver 1 Adapter 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.