Motorola SYN8419C/SYN8419 2.5mm Hands-Free Headset - Original OEM - Non-Retail Packaging - Black (Discontinued by Manufacturer) All it takes is a simple 2.5 mm connection and you're talking. The inline microphone hangs just under your jaw and will pick up your voice loud and clear. With this Motorola 2.5mm Hands free Headset you have the freedom to keep in touch while multitasking. The mono ear bud lightly sits in your ear and the clothing clip allows for clipping to your shirt for quick and easy access when needed.