InLine Audio Headset Adapter Cable 3.5mm male 4 Pin / 2x 3.5mm, black, 1m

The InLine Audio Headset Adapter Cable (99302J) is a 1 m black cable that converts a single 4‑pin 3.5 mm audio jack into two standard 3.5 mm female sockets. It enables the connection of conventional computer headsets with separate microphone and headphone plugs to devices that use a combined 4‑pole headset jack, such as many smartphones, laptops and certain notebook models. Gold‑plated contacts improve signal transmission and corrosion resistance.

Advantages

This adapter cable supports CTIA/AHJ (Apple-style) pin assignment used by iPhone, iPod Touch, MacBook models and various HTC and Lenovo devices, providing compatibility with many consumer devices that have a single 4‑pole audio output. The 1 m length offers flexible placement, and the black jacket with gold‑plated contacts ensures durable connections and reduced signal loss.

Suitable for

• Connecting a PC headset (separate mic and headphone plugs) to a smartphone with a 4‑pole jack
• Using wired headsets with laptops that have a combined audio/microphone port
• Adapting older headsets for use with MacBook or other modern notebooks with a single 3.5 mm TRRS socket

Key specifications

• Brand: InLine
• Model / MPN: 99302J
• Length: 1 m
• Connector A: 3.5 mm male, 4‑pole (TRRS)
• Connector B: 2 × 3.5 mm female (stereo and microphone)
• Colour: Black
• EAN: 4043718265848

How to use

Plug the 3.5 mm male 4‑pole connector into the device's combined headset jack (smartphone, laptop, etc.). Insert the headset's headphone plug into the female socket marked for audio and the microphone plug into the female socket marked for mic. After connecting, check audio playback and microphone input in the device settings to confirm correct operation.

Recommendations

Ensure your headset follows the CTIA/AHJ pinout (Apple‑style). If your headset uses OMTP wiring, microphone and headphone signals may be swapped; in that case use an OMTP-to-CTIA adapter or a headset explicitly compatible with the device.