Specification: Item Type: Telephone Headset Material: ABS Model: H390 3.5VA Color: Black Type: Single Ear Plug: 4 Sections Single 3.5mm (Small Straight Head) Function: Call, Speaker Volume Adjustment Scope of Application: Compatible with Devices with3.5mm Headphone Jack Speaker Parameters: Sensitivity: 1053dB (at 178mV 1kHz) Voice Coil Impedance: 15015 (at 1kHz) Frequency Characteristics: 100Hz-10kHz Distortion: 5% (at 178mV 1kHz) Microphone Parameters: Directivity: Single Point Sensitivity: -402dB (2.0V, 2.2K, 1kHz) Distortion: 5% (at 4.5V 2.2K 1kHz) Frequency Characteristics: 200Hz-6kHz Current Consumption: 100-500A Package List:1 x Telephone headset About this item NOISE REDUCTION: Traffic headset has a built in high definition microphone, which can be twisted at will; make your voice large and clear, and provide clear dialogue in noisy environments. COMFORTABLE: Headphone is equipped with soft earmuffs and flexible headband, which will not put any burden on your ears, ultra light and long lasting comfort, ensuring you concentrate on your work. EASY TO USE: 3.5mm wired telephone headset, plug and play, no driver required. Support speaker volume adjustment, easy to use. The long headphone cable provides flexibility on the move. SUPER DURABLE: Cell phone headset is designed with sturdy construction and high quality ABS material, which is wear resistant, ensuring super performance and making it durable. MULTI APPLICATION: Business headphone is compatible with devices with a 3.5mm jack. Suitable for home, office, call center, telemarketing, customer service, conference call and other scenarios. NOISE REDUCTION: Traffic headset has a built in high definition microphone, which can be twisted at will; make your voice large and clear, and provide clear dialogue in noisy environments. COMFORTABLE: Headphone is equipped with soft earmuffs and flexible headband, which will not put any burden on your ears, ultra light and long lasting comfort, ensuring you concentrate on your work. EASY TO USE: 3.5mm wired telephone headset, plug and play, no driver required. Support speaker volume adjustment, easy to use. The long headphone cable provides flexibility on the move. SUPER DURABLE: Cell phone headset is designed with sturdy construction and high quality ABS material, which is wear resistant, ensuring super performance and making it durable. MULTI APPLICATION: Business headphone is compatible with devices with a 3.5mm jack. Suitable for home, office, call center, telemarketing, customer service, conference call and other scenarios.