Check the listing for details. RJ11 adapter for Headset-Micro Jack 3.5 mm hotline telephone handset cable. Condition: New. Listed at 15.33 USD. Adapter Cable RJ11 Male to Dual 3.5mm Female (Audio + Micro) This adapter makes it possible to use a headset equipped with a 3.5 mm jack on a telephone set instead of the standard handset with RJ11 socket.It is the essential accessory for telemarketers, hotline technicians, or anyone wishing to use a comfortable headset on a telephone without having to purchase a specific telephone headset, generally much more expensive than a multimedia headset for a PC. . RJ11 male plug to 2 female 3.5mm audio + microphone plugsLength approx 25cm (connectors included)Color Black IMPORTANT: MAKE SURE YOU HAVE A PORT RJ11 (7.6mm plug width) ON YOUR PHONE AND NOT RJ9, RJ10 OR OTHER. Shipped from FRANCE within 24 hours by Letter with Tracking (the tracking number will be sent to you) English description:Double 3.5mm female plug (audio + mic) to RJ11 plugLength: 25cm (Connectors included)