EncorePro Headset offers an ultra-lightweight design with plush ear cushion and featherweight materials. Ideal for call centers. Noise-canceling technology delivers crisp and clear communications with no distracting background noises. High-frequency wideband response improves overall audio clarity and ensures clear conversation. Quick Disconnect cord offers the freedom to easily walk throughout the office without removing the headset. Adjustable clothing clip and 10' coil cord provide plenty of room to move. Single-ear design for either ear lets you hear what's going on around you without removing the headset. Extendable-boom microphone can be moved to optimize its position for calls and conveniently swings out of the way when not in use. Headset requires a Plantronics audio processor, USB audio processor, or direct connect cable to connect to a phone.