Feature:1. High Definition Microphone: Traffic headset has a high definition microphone, which can be twisted at will; less noise and clearer sound, providing clear dialogue in noisy environments.2. Comfortable: Telephone headset with ultra lightweight design, soft ear pads and flexible headband that do not put a burden on your ears. Long lasting comfort so you can focus on work.3. Plug And Play: Wired telephone headphone, 2.5mm plug, plug and play, no driver required, easy to use. Equipped with a long headphone cable, it is more flexible to move.4. Widely Compatible: Phone headset is compatible with devices with a 2.5mm jack. Suitable for home, office, call center, telemarketing, customer service, conference calling, etc.5. Sturdy Construction: Business headphone has a sturdy construction, made of high quality ABS material to ensure super performance, which is wear resistant and durable.How to Use:Plug and play.Specification:Item Type: Telephone HeadsetMaterial: ABSModel: H390 2.5Color: BlackType: Single EarPlug: 3 Sections Single 2.5mm (Small Elbow Head)Function: CallScope of Application: Compatible with Devices with 2.5mm Headphone JackSpeaker Parameters:Sensitivity: 105±3dB (at 178mV 1kHz)Voice Coil Impedance: 150±15Ω (at 1kHz)Frequency Characteristics: 100Hz-10kHzDistortion: ≤5% (at 178mV 1kHz)Microphone Parameters:Directivity: Single PointSensitivity: -40±2dB (2.0V, 2.2KΩ, 1kHz)Distortion: ≤5% (at 4.5V 2.2KΩ 1kHz)Frequency Characteristics: 200Hz-6kHzCurrent Consumption: 100-500µA Package List:1 x Telephone Headset