Feature:1. NOISE CANCELING MICROPHONE: The built in HD microphone provides clear dialogue even in noisy environments, and can be twisted at will.2. ERGONOMIC DESIGN: Phone headset provides you with ultra light wearing experience. Soft ear pads and flexible headbands don't put any strain on your ears.3. SIMPLE OPERATION: Easy to use, RJ9 plug, plug and play, no driver. Wide compatibility, suitable for devices with RJ9 headphone jack.4. HIGH DURABILITY: The rugged construction and material design ensures superior performance and makes it durable. The long headphone cable provides mobility.5. WIDE APPLICATION: Ideal for home, offices, call centers, telemarketing, insurance, customer service, teleconferencing, and more.How to Use:Plug and playSpecification:Item Type: Telephone HeadsetMaterial: ABSModel: H360 - RJ9 Color: Black Type: Monaural Plug: RJ9 Crystal Head Function: Call Scope of Application: For Devices with RJ9 Headphone Jack Horn Parameters: Sensitivity: 105±3dB (at 178mV 1KHz) Voice Coil Impedance: 150±15Ω (at 1KHZ) Frequency Characteristics: 100HZ-10khz Distortion: ≤5% (at 178 mV 1KHZ) Microphone Parameters: Directivity: Single Direction Sensitivity: -40±2dB（2.0V，2.2KΩ，1KHz）Distortion: ≤5% (at 4.5V 2.2KΩ 1KHZ) Frequency Characteristics: 200Hz-6KHzConsumption Current: 100-500υA Package List:1 x Telephone Headset