Description Mode:1. Output audio to speakers via audio cable, 2.Output audio to speaker via USB cable TX Mode:1.Input audio to the adapter through the audio cable, and then transmit audio to the Bluetooth headset or speaker, 2.Input audio to the adapter via USB,and then transmit audio to Bluetooth headphones or speakers Sound Card Mode:PCS USB to 3.5 headset, convert audio to headset 3.5 audio output via USB adapter Microphone:It support microphone under mode Material: plastic colour: black Package Contents: 1 x Bluetooth audio adapter 1 x 3.5MM aux 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. Note: Please allow slight errors due to manual measurement. Please make sure you don't mind before bidding. Color may vary depending on your monitor, please understand. Note: Hello, please pay attention to your shipping address when purchasing products. If your delivery information (e.g. name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly