Thank you for viewing. From the official website: ・A wireless stereo headset with a built-in FM tuner, allowing you to enjoy radio even on its own. Comes with sealed in-ear headphones. Equipped with an organic EL display that can display the incoming phone number, battery level, FM radio frequency, Japanese song titles, etc. Supports "multi-pairing," which allows registration of up to 3 devices. Simultaneous connection of 2 devices is possible for separate uses such as calls and music. The main unit has some scratches. The earphone part has yellowed slightly due to aging. If you are concerned, please refrain from purchasing. The power turns on properly, pairing is normal, and FM radio can be heard. I actually used it, and the hands-free calls while driving were clear, and the other party said there was little noise. No box or instruction manual.