Feature:1. NOISE REDUCTION: Built in high definition microphone, can be arbitrarily twisted, make your voice loud and clear. Provide clear dialogue even in noisy environments. The noise is smaller and the sound is clearer.2. ULTRA LIGHT: Ultra light wearing experience, soft ear cushions and flexible headband will not cause any burden to your ears. The ultra lightweight design ensures that you focus on your conversation and lasting wearing comfort.3. PLUG AND PLAY: The black single ear customer service headset fits a 2.5mm plug; plug and play, no driver is required, and it is easy to use. Support speaker volume adjustment.4. ULTRA DURABLE: The earphones are designed with sturdy structure and materials to ensure superior performance and make them durable. The long headphone cord provides flexibility of movement.5. WIDE COMPATIBILITY: Suitable for devices with 2.5mm headphone jack. Ideal for home, office, call center, telemarketing, insurance, customer service, teleconference, etc.How to Use:Plug and playSpecification:Item Type: HeadphonesModel: H360-2.5VAMaterial: ABSColour: BlackType: Single EarPlug: 2.5mm PlugFunction: Call/Speaker Volume AdjustmentScope of Application: For 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: 100-500υA Package List:1 x Telephone Headset