I purchased this about six months ago, but I'm selling it because I have no use for it. It has been opened, but it's basically unused, with only a simple power-on check performed. The only missing accessory is the USB-C charging cable. (You can charge it with a standard smartphone USB-C cable) It will be shipped via Nekopos, so please note that it will be delivered to your mailbox. The following is a reprint from the sales website: UGREEN Bluetooth 5.4 Transmitter for Airplane (for 2 AirPods or Headphones) Wireless Bluetooth Adapter Compatible with all AirPods including AirPods 4/Pro2/Max Dual 3.5mm AUX Jack Adapter Included Telec Certified "Dual Pairing Bluetooth Transmitter": After connecting this device to non-Bluetooth devices such as airplanes or TVs, you can pair the Bluetooth transmitter with your AirPods for wireless music streaming. The Bluetooth adapter supports dual pairing, allowing you to easily share music with family and friends. "Designed Specifically for AirPods" – Specially designed to deliver the best performance with all AirPods models, including AirPods 1/2/3/4, AirPods Pro/Pro 2, and AirPods Max, providing a stable connection, clear sound quality, and hassle-free pairing. "Easy-to-Use Design": Dual-button operation and intuitive LED indicators make it easy to check the pairing status and battery level of the Bluetooth transmitter. It can remember up to 6 devices, saving time and effort with automatic reconnection after pairing. "Latest Bluetooth 5.4 Technology": Bluetooth 5.4 connects devices faster and provides more stable signal transmission. "Up to 19 Hours of Battery Life": Can be used continuously for up to 19 hours, meeting your all-day usage needs. "10m Transmission Distance": With a transmission distance of 10 meters, you don't have to worry about the audio signal being interrupted when moving freely at home or in the office.