I purchased this with the intention of using it for work, but I never used it and have been storing it, so I am putting it up for sale. I have only tested the functionality and tried it on. When shipping, I will either flatten or discard the box to reduce the size. Bluetooth 4.1 compatible clip-on wireless headset, with up to 23 hours of talk time. - Model Name: KH-M300-B - Color: Black - Bluetooth Version: Bluetooth 4.1 - HD Voice: Supported - Continuous Talk Time: Up to 23 hours - Standby Time: Up to 13 days - Included Accessories: Instruction manual - Shape: Clip-on