Over-ear headset with Bluetooth connectivity and noise-canceling function. - Brand: ELECOM - Connectivity: Bluetooth - Noise-canceling: Yes - Design: Over-ear - Microphone type: Boom microphone - Battery life: Approximately 33 hours Thank you for viewing. This item is unused, having been taken out of the box today. Purchased at K's Denki for around 9000 yen. Suitable for remote work, etc. There was no original instruction manual, but it can be downloaded from the ELECOM website. No box included.