Elecom's compact and lightweight wireless headset, designed in blue and black. NFC pairing compatible. - Model Name: LBT-HS40M - Color: Blue/Black - Included: Ear tips (S/M/L 3 sizes), ear hooks (right/left), USB charging cable I used this occasionally when I went out. I haven't used it much, so I've kept it in storage. I'm putting it up for sale, hoping someone will use it. I was able to connect it to my smartphone via Bluetooth. I have confirmed that music and phone calls work after connecting. The battery seems to have plenty of charge, even after 30 minutes of charging with my smartphone. There is no instruction manual. I have confirmed that it is available online.