This is a wireless, single-ear headset from Logicool (Elecom). I used this regularly, but I'm selling it because my lifestyle has changed and I no longer need it. I hope someone else can use it. * Doesn't block your ear, so you can hear your surroundings. * Ear hook prevents it from falling out. * Physical volume buttons make it easy to operate. * Stable operation, including recognition by your smartphone and standby for connection to two devices. Why not use it as a spare in your car? USB charging uses the standard Type-B connector (trapezoidal connector). I was able to connect it to my smartphone. I have confirmed that it works for music and phone calls. After connecting to my smartphone for 30 minutes, the charge was still at 100%. The box is not included. The contents are everything else that was included. I will include multiple documents, such as the instruction manual, that came with the purchase. I will wrap it in cushioning material for shipping. The following is a description automatically generated by Mercari: --------- Bluetooth 3.0 compatible wireless headset with approximately 5 hours of use. - Model Name: LBT-HS320 - Bluetooth Version: Bluetooth 3.0 - Supported Profiles: A2DP, HSP, HFP - Color: Black - Usage Time: Approximately 5 hours - Charging Method: USB charging