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

The InLine Audio Headset Adapter Cable (model 99302K) converts a single 3.5 mm 4‑pole audio socket into two 3.5 mm female sockets, allowing conventional computer headsets to be connected to devices with a 4‑pin audio output such as smartphones, laptops and select notebooks. The cable follows the common TRRS pin assignment used by many Apple devices, some HTC models and certain Lenovo and Dell notebook series, enabling microphone and stereo audio passthrough where supported.

Advantages

This adapter provides a 2 m flexible connection with gold‑plated contacts for improved signal quality and corrosion resistance. Its black, slim cable and compact connectors make it easy to route and carry. The splitter design preserves both audio channels and microphone functionality on compatible devices.

Suitable for

• Connecting computer headsets with separate headphone and microphone plugs to smartphones and laptops with a single 3.5 mm 4‑pole jack
• Using headsets with MacBook and MacBook Pro models that use TRRS pinout
• Connecting headsets to compatible HTC and select Lenovo/Dell notebooks

Key specifications

• Brand: InLine
• Model (MPN): 99302K
• EAN: 4043718265855
• Connector 1: 3.5 mm male (TRRS, 4‑pole)
• Connector 2: 2 × 3.5 mm female (stereo + mic)
• Cable length: 2 m
• Product colour: Black
• Contacts: Gold‑plated

How to use

Insert the 3.5 mm male plug into the device’s 4‑pole audio jack. Plug the headset’s headphone and microphone plugs into the corresponding 3.5 mm female sockets on the adapter. Confirm in the device settings that external headset and microphone are selected if required. Use gently to avoid stressing the cable near the connectors.

Recommendations

For reliable microphone and remote control operation, verify that the target device uses the CTIA/TRRS pinout (same as modern Apple and many Android devices). If microphone or remote does not work, check device compatibility and try a different headset to rule out wiring mismatches.