Features 1、Noise Cancellation: Customer service headset has a built in HD microphone that can be twisted at will to make your voice loud and clear, even in noisy environments to provide clear conversation. 2、All Day Comfort: Phone headsets give you an ultra light wearing experience, and the soft ear pads and flexible headband don't put any strain on your ears, ensuring you stay focused on your conversation. 3、Easy to Use: Built in USB interface, USB C interface, 3.5mm jack 3 interfaces, plug and play, no driver, easy to use. Supports speaker volume adjustment and microphone mute. 4、Rugged and Flexible: USB phone headsets are designed with robust construction and materials to ensure superior performance. The long headphone cable provides mobility. 5、Wide Compatibility: Phone headset is compatible for devices with USB interfaces, ideal choice for offices, call centers, telemarketing, insurance, customer service, conference calls, and more. Specification Item Type: 3.5mm Phone Headset Material: ABS Color: Black Type: Dual ear Function: Support Speaker Volume Adjustment/Microphone Mute Compatibility: PC, Laptop, Smartphone, Tablet Speaker: Sensitivity: Approx. 105±3dB (at 178mV 1KHz) / 100Hz-10KHz Coil Impedance: Approx. 150±15Ω (at 1KHZ) Distortion: ≤5% (at 178mV 1KHZ) Microphone: Directionality: Unidirectional Sensitivity: Approx. -40±2dB (2.0V, 2.2KΩ, 1KHz) Distortion: ≤5% (at 4.5V 2.2KΩ 1KHZ) Frequency Characteristic: 200Hz-6KHz Current Consumption: 100-500µA Package List 1 x Customer Service Headset 1 x USB to USB C Adapter 1 x User Manual