Working bone conduction Bluetooth speaker, under-pillow type... This is a Bluetooth speaker designed to be placed under your pillow. It uses a structure that transmits sound through vibrations, similar to bone conduction, but in reality, it's the speaker's casing that resonates to produce the sound. ■ Condition: Tested and working (Bluetooth connection OK) ■ Size: Approximately ○ x ○ x 4cm (height) ■ Included: Main unit, USB cable (Type-A ⇔ Type-C) ■ Comes in a box This is a great item for playing background music or audiobooks before bed. ※ I want to sell this to someone who needs it, so I will not be offering a discount. ➡ I will occasionally review the price! #BluetoothSpeaker #BoneConductionSpeaker #PillowSpeaker #UnderPillowSpeaker #BedroomUse #RelaxationAudio