1. This 2.5mm office phone headset is 100% compatible with landline phones or cordless Dect phones with a 2.5 mm headset jack. 2. The noise-cancelling microphone ensures a clear voice, it can filter unnecessary background noise and pick up your voice loudly. 3. You only need to insert the 2.5 mm plug into the headset port of the phone, which is easy to operate. 4. The lightweight, ergonomically designed headset ensures that the phone headset can be worn comfortably throughout the day. 5. This telephone headphone is ideal for business, call center, conference calls, dictation, etc. Specification: Item Type: Headset Model: H600-2.5 Material:ABS Colour: Black Plug Type: 2.5mm Speaker Parameters: Sensitivity: 105±3dB(178mV 1KHz) Voice Coil Impedance: 150±15O(1KHZ) Frequency Characteristics: 100Hz-10KHz Distortion: =5%(178mV 1KHZ) Microphone Parameters: Directivity: Single Point Sensitivity: –40±2dB(2.0V,2.2KO,1KHz) Distortion:=5%(4.5V 2.2KO 1KHZ) Frequency Characteristics:200Hz-6KHz Applicable Device: Landline Phone or Cordless Dect Phone with 2.5mm Headphone Jack How to Use: Plug and play. packing list: 1 x Headset 1 x Manual

?DURABLE MATERIALS?You only need to insert the 2.5 mm plug into the headset port of the phone, which is easy to operate. Professional structural design with solid cord ensures this office phone headset more durable. ?EASY TO USE?Directly plug and use, no additional amplifiers or adapters required. The business telephone headset has inline volume control and mute switch to provide convenience for calls, which is an ideal choice for call center services, teleconferences, telemarketing, homes and offices. ?LIGHTWEIGHT AND COMFORTABLE?Wired office headset with adjustable and flexible headband fits all head size perfectly and wear on firmly. Ultra lightweight telephone headset equipped with soft leatherette ear cushion improves the comfort of all-day wearing. ?CRYSTAL CLEAR CALLS?Mono 2.5MM landline phone headset with 330°adjustable, flexible microphone supports your wearing preferences and delivers optimal clear voice. Noise-cancelling mic reduces background noise. Acoustic Shock Protection Circuit protects your hearing from fatigue and loss. ?2.5MM TELEPHONE HEADSET?This 2.5mm office phone headset is 100% compatible with landline phones or cordless Dect phones with a 2.5 mm headset jack. The lightweight, ergonomically designed headset ensures that the phone headset can be worn comfortably throughout the day.