ienza&reg; 3.5mm Female to 2.5mm Male Adapter Cable: Smartphone (or PC Headset with a Single 3.5mm 4 Poles Male Jack) to Cordless Phone Adapter This cable will allow you to use your Smartphone (or PC Headset with a Single 3.5mm 4 Poles Male Jack) on your cordless phone Compatible with Panasonic KX-TCA60 Hands-Free Headset, and other cordless phone headset with 2.5mm jack Specifications: 3.5mm Female to 2.5mm Male Cable, approx 6 inches ienza is a registered trademark. Use of the ienza trademark without the prior written consent of ienza, LLC. may constitute trademark infringement and unfair competition in violation of federal and state laws. ienza products are developed as cost-effective alternatives to OEM parts. They are not necessarily endorsed by the OEMs....Guarantee: If you are not satisfied with the product you received, send it back to us within 30 days and we will issue you a refund!