Features 1、NOISE CANCELLING MICROPHONE: Telephone headset with HD microphone that can be adjusted at will to make your voice loud and clear. Provides clear conversations even in noisy environments. 2、ALL DAY COMFORT: Phone headset comes with soft ear cushions and a flexible headband, won't put any strain on your ears. The ultra lightweight design ensures that you can focus on your conversation, with long lasting wearing comfort. 3、EASY TO USE: This office headphone has USB, USB C, 3.5mm three kinds of interfaces, plug and play, no driver required, easy to use. Supports speaker volume adjustment and microphone mute. 4、WIDE APPLICATION: Business headphone is compatible with devices with USB port, such as VOIP landline, PC, laptop. Ideal for home, offices, call centers, telemarketing, customer service, conference calls, and more. 5、PREMIUM MATERIAL: Telephone headset is made of premium ABS material, sturdy structure design, wearable and not easy to deform. The long headset cord provides flexibility for mobility. Specification Item Type: Telephone Headset Material: ABS Color: Black Type: Monaural Function: Support Speaker Volume Adjustment, Microphone Mute Applicable Range: For PC, Laptop, Mobile Phone, Tablet Speaker Parameters: Sensitivity: 105±3dB (at 178mV 1KHz) Voice Coil Impedance: 150±15Ω (at 1KHz) Frequency Response: 100Hz-10KHz Distortion: ≤5% (at 178mV 1KHz) Microphone Parameters: Directional: Unidirectional Sensitivity: -40±2dB (2.0V, 2.2KΩ, 1KHz) Distortion: ≤5% (at 4.5V 2.2KΩ 1KHz) Frequency Characteristics: 200Hz-6KHz Current Consumption: 100-500µA Package List 1 x Telephone Headset 1 x USB to USB C Adapter 1 x User Manual