Product description: This headphone / microphone combo jack splitter (4 positions 3.5mm to dual 3 positions 3.5mm) is a headphone splitter adapter with one 3.5mm male (TRRS) and two 3.5mm (TRS) female connectors Allows you to add a mono microphone input and stereo output through a single 3.5mm audio port to a PC or laptop. It can turn the combo port into two different ports-a 3.5 mm headphone jack and a 3.5 mm microphone port. Product parameters: 1. Convert the 3.5mm combined headphone / microphone port to two different ports-a 3.5mm headphone jack and a 3.5mm microphone port 2. Allow older audio accessories to be used on newer computers 3. Compact design maximizes portability-an excellent solution to carry a handbag with you 4. Can be used with any portable device that uses a 4-position 3.5mm jack, such as compatible with iPhone, iPod and compatible with iPad devices 5. Color: black, red and green 6. Cable length: 8 inches (20cm) Features: A. Innovative audio port: Although some laptops from compatible with Apple and compatible with Dell have only one (4-bit) 3.5 mm audio port to support audio input and output, this innovative headphone splitter adapter divides the audio port into two different ports-one can be used for The microphone input connection, the other is used to connect external (output) speakers. B. Compact and sturdy design: The headphone dispenser has a compact and rugged design, which provides a perfect solution for applications that require portability, and only takes up very little space in a laptop bag. This adapter is not a headphone splitter / Y-cable. It cannot be used to distribute audio output to two separate sets of headphones or speakers. Some laptops and mobile devices cannot be used with all external microphones. This is usually caused by hardware incompatibility, and the impedance between the microphone and the device does not match-this is not a limitation of the adapter. To ensure proper hardware detection, we recommend plugging external headphones into the adapter before connecting the adapter to a computer or mobile device. Note: This adapter is not a headphone splitter / Y-cable, it cannot be used to distribute audio output to two separate sets of headphones or speakers. The package includes: Audio cable * 1 Convert the 3.5mm combined headphone / microphone port to two different ports-a 3.5mm headphone jack and a 3.5mm microphone port Allow older audio accessories to be used on newer computers Compact design maximizes portability-an excellent solution to carry a handbag with you Can be used with any portable device that uses a 4-position 3.5mm jack, such as compatible with iPhone, iPod and compatible with iPad devices The headphone dispenser has a compact and rugged design, which provides a perfect solution for applications that require portability, and only takes up very little space in a laptop bag