This pair of Bluetooth call center headphones give you a noise cancelling communication. Advanced Bluetooth CSR8615-V4.0 CLASS2 assures a stable and smooth connection, gives you a hear-and-be-heard communication with no delay. Furthermore, it allows you to have phone calls for 12 hours continuously with no stuck or cut. Features: ¡¾NO FALLING¡¿ The head guard turn will close to your head to give you a secure wearing without falling. design and high quality ABS make this call center headset very and reliable. ¡¾STABLE BLUETOOTH CONNECTION¡¿Advanced Bluetooth CSR8615-V4.0 CLASS2 ensures the stability and smooth of connection, thus giving you stable and smooth phone calls, letting you achieve great customer service. ¡¾COMFORTABLE WEARING¡¿Earmuff supports 360¡ã rotation. Headband can be sretched and put away. Makes it suitable for head of different sizes to give you comfortable wearing. Specifications: Product type: Call Center Bluetooth Headset Bluetooth version: CSR8615-V4.0 CLASS2 Supported protocol: HFPV1.6, HSPV1.2, A2DPV1.2, AVRCPV1.4 Phone call time: 12 hours Standby time: 250 hours Charging port: Micro USB Battery: 3.7V 180mAh lithium battery Bluetooth connection distance: about 10 meters/ 10.94 yd Microphone: YES Suitable: For computer, phones,and other Bluetooth devices Package size: approx. 18.5 * 14 * 6 cm/ 7.28 * 5.51 * 2.36 in Package weight: 156g Package List: 1 * Call Center Bluetooth Headset 1 * USB Charging Cable 1 * User Manual