Grandstream - GR-GUV3050 Bluetooth Headsetbinaural version which  compatible with any Bluetooth-enabled device, as well as any device that offers a USB connection using the included USB dongle, including mobile devices, laptops computers and Grandstream IP phones. The best-in-class, noise-cancelling microphones and Active Noise Cancellation (ANC). Has multi-connectivity to switch between softphone/PC and mobile calls. Integrated ring-shaped busy lights on both sides of headset to indicate a call-in progress