Brand: ELECOM Color: White Ear Placement: In-Ear Headphone Type: In-Ear Frequency Response: 2.4 GHz Headphone Jack: USB These Bluetooth(R) wireless stereo headphones feature an ergonomic design that fits the shape of the ear, a minimalist size, and an ultra-lightweight design, making them ultra-compact both when worn and when stored. These are FASTMUSIC(TM) headphones, an entry-level label with the theme of "cute, fun, and colorful," allowing you to easily experience surprisingly good sound. The headphones can be used with only one side. (Turn off the other headphone or store it in the charging case). They reduce the anxiety of the headphones falling out, allowing you to enjoy music comfortably. They achieve a high level of fit regardless of the size or shape of your ears. With ultra-compact headphones weighing only about 3.4g per side and an ultra-compact charging case that fits in the palm of your hand, they won't get in the way when worn or carried. Currently sold on Amazon for 3800 yen.