VTech VK250 Corded 2.5mm Headset - Over the Head Design - Built in Microphone (Reversable for Left or Right side) VTech Corded Headset with Universal 2.5mm plug (Gold Plated) Perfect for Home Phones or compatible Cellular phones Built in Boom Style Mic for 2 way communication Noise Cancelling Technology built into the Mic for clearest sound Clothing clip for added comfort and security