Feature: 1. Noise Canceling Headset: Built in HD microphone that can be twisted at will to make your voice loud and clear. Provides clear conversations even in noisy environments. 2. Comfortable Wearing Experience: Telephone headset uses soft ear cushions and a soft headband with an ultra lightweight design for comfortable, long lasting wear all day. 3. Easy to Use: USB plug design, plug and play, no driver required, easy to use, supports speaker volume adjustment and microphone mute function. 4. Ultra Durable: The headset is designed with rugged construction and materials to ensure superior performance. Long headset cable provides flexible mobility. 5. Multi Purpose: The headset is suitable for a variety of computers. Ideal for home offices, call centers, telemarketing, insurance, customer service, teleconferencing, etc. Specification: Item Type: Telephone Headset Material: ABS Color: Black Type: Monaural Plug: USB interface Function: Call, speaker volume adjustment, microphone mute Scope of Application: Fit for devices with USB interface Speaker Parameters. Sensitivity: 105±3dB (At 178mV 1KHz) Voice Coil Impedance: 150±15Ω (At 1KHZ) Frequency Characteristics: 100Hz-10KHz Distortion: ≤5% (At 178 MV 1KHZ) Microphone Parameters. Directivity: Single Pointing Sensitivity: -40±2dB (2.0V, 2.2KΩ, 1KHz) Distortion: ≤5% (At 4.5V 2.2KΩ 1KHZ) Frequency Characteristics: 200Hz-6KHz Current Consumption: 100-500υA. Package List: 1 x Telephone Headset1 x Manual