XIANQI Properties: brand new and high quality. Compatible with 3.5mm plugs, which is suitable for most electronic devices such as iPod, MP3, MP4, radio, CD player, etc. Thickness: 1.2 cm Diameter: 6cm color white Package content: 1x 3.5 mm pillow speaker [Plug and Play]---Under the pillow speaker, just put it next to the pillow and connect it to the device, you can enjoy beautiful music without disturbing others. [Under Pillow Speaker]---It emits beautiful music and helps you sleep well. It is very suitable for listening to relaxing music, self-hypnosis or baby soothing, allowing you to sleep well and helping you sleep. [Strong compatibility]---Suitable for most devices, almost compatible with all audio devices with 3.5mm jacks, such as MP3, MP4, CD players, mobile phones, iPods, etc. [HD Sound Quality]---Provide impressive real HD and unique soft sound to enhance your music experience. [Portable and Mini]---Fine workmanship, beautiful appearance. Lightweight and easy to carry.