Item Type: Call Center Headset Model: H390D-RJ9-MVA Material: ABS Color: Black Type: Binaural Connector: RJ9 Features: Call answering, speaker volume adjustment, microphone mute, six-step line sequence adjustment Scope of Application: Compatible with devices with RJ9 headset jacks Speaker Parameters: Sensitivity: 105±3dB (at 178mV 1KHz) Voice Coil Impedance: 150±15Ω (at 1KHZ) Frequency Range: 100Hz-10KHz Distortion: ≤5% (at 178 mV 1KHZ) Microphone Parameters: Directional Pattern: Unidirectional Sensitivity: -40±2dB (2.0V, 2.2KΩ, 1KHz) Distortion: ≤5% (at 4.5V 2.2KΩ 1KHZ) Frequency Range: 200Hz-6KHz Current Consumption: 100-500υA [Noise Reduction] Built-in HD microphone can be freely rotated for less noise and clearer sound. Even in noisy environments, it can provide clear conversations, so your voice is clear. [All-Day Comfort] Soft ear cushions and flexible headband do not burden your ears. The ultra-light design ensures you can focus on the conversation and maintain long-lasting comfort. [Easy to Use] Plug and play, no driver required, supports speaker volume adjustment, microphone mute, six-position line sequence adjustment and other functions, easy to use. [Ultra Durable] The headset is designed with robust construction and materials to ensure excellent performance and make it durable. Long headphone cord provides flexibility of movement. [Wide Compatibility] Compatible with devices with RJ9 headset jacks, ideal for home offices, call centers, telemarketing, insurance, customer service, teleconferencing, etc., with a wide range of uses. Includes: 1 x Call Center Headset