![Digital Optical to Analog 3.5mm + 2RCA HD Stereo Audio Cable](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
Warm Tips.
1、Audio cable must be connected to USB power supply to work.
2, this product is equipped with a 3.5mm female to female connector is a 3-core connector, can not be used with a 4-core headphone plug match.
3, there is no self-amplifier function of the old speakers, to access the amplifier, otherwise the sound will be very small or even no sound output. (Any audio conversion line is a signal transmission line, its signal current can only directly drive the headphones).
4, speakers and headphones should not be connected to the audio line at the same time, otherwise the speaker will have no sound.
5, please keep the light port clean, do not overbend the optical fiber, the first use, plugging and unplugging is relatively tight, please pinch the plug, do not force pull the fiber.
6, this product is applicable to most smart TVs on the market, very few models of TVs correctly connected to the audio cable if there is no sound output, please try to refer to the "Figure 6" settings on this detailed page, if there is still no sound output then it may not be compatible with your TV.