Everything works perfectly except for the Bluetooth function; this is a REDHILL eye massager. 【Product Specifications】 * Product Name: REDHILL Eye Massager * Color: White * Power Source: USB Rechargeable * Weight: Approximately 300g * Main Functions: Air pressure massage Vibration function Heating function (approx. 38-42℃) Automatic off timer * Foldable design, easy to carry * Bluetooth function (※Not usable) * Accessories: Outer box, charging cable, instruction manual All massage and heating functions work perfectly, but the Bluetooth function does not respond, and music playback is not possible. We would appreciate it if you could purchase this item with the understanding that the Bluetooth function is not working. Immediate purchase is welcome. This item has been in someone's possession and stored at home. If you are concerned about minor details such as initial scratches or stains, or if you are looking for a perfect condition item, please refrain from purchasing. To prevent issues such as product substitution, returns and refunds are not accepted. Thank you for your understanding.