Welcome to our store! 1. Wide Compatibility: Our high-quality noise-canceling call center headsets are compatible with call center wired telephone equipment, landline phones, and other devices with RJ9 ports. Strong compatibility, robust and convenient. 2. Noise-Canceling Microphone: The 150-ohm speaker uses hearing protection technology, and the microphone's noise-canceling capability reaches the level of aircraft noise reduction. It is equipped with a noise-canceling microphone. 3. Comfortable Headphones: Ultra-lightweight telephone headset with adjustable headband for all head sizes, flexible microphone to suit your preferences, soft, high-quality ear cushions for enhanced all-day comfort. 4. Flexible: 330° adjustable, sophisticated design, integrated headband structure is more durable. It supports external volume control and microphone switch, which is very convenient. The cables are retractable and prevent tangling. 5. Usage Scenarios: Perfect for people who receive many calls every day, home and office work, call centers, telemarketing, customer service users, telephone workers, online education, training, customer service. Perfect for online courses, Skype chats, conference calls, and more. Item Type: Telephone Headset Material: ABS Line Length: Before Stretching: Approx. 1.5m/4.9ft After Stretching: Approx. 2m/6.6ft Frequency Response: 20 to 20kHz Impedance: 150Ω Sensitivity: 125dB Connector: RJ9 Crystal Head 1 x Telephone Headset Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!