Panasonic KX-TCA60 Hands-Free Headset for $8.55. Shipping is free on orders over $25. If needed, use this Filler Tool to qualify for free shipping. Here is a screenshot for your reference. It uses standard 2.5-mm jack and features a boom-style microphone adjustable for optimum level, 4-ft cord and lapel clip. Most places have this headset for about $11 or more.