This model does not distinguish between forward and reverse transmission. The 2-port interface can be used as output or input. The specific functions can be converted according to different devices. This product converts 3.5mm stereo to dual 6.35mm (1/4) mono, red is the right channel, white is the left channel. Product use: Used for interface conversion of mixers, headphones, power amplifiers, active speakers, live sound cards and other equipment. Use: Connect the mobile phone to the audio, connect the 3.5mm interface audio cable of the mobile phone to this adapter cable, and connect the 6.35mm interface to the input interface of the mixer or active speaker. Connector Type:Auxiliary Cable Type:AUX Compatible Devices:Monitor Color: Grey Material: Aluminum Alloy Size: B: 2m Package Contents: 1Set * Audio Cable 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.