Parameters: Bluetooth solution: V5.4 HSP, HFP, A2DP, AVRCP Power supply: 5V/1A Weight: 47g (color box, includes: main unit, charging cable, manual) Battery capacity: 250mAh (Flight life: Transmit: 9 hours, Receive: 11 hours) Packaging: 1 pc/neutral English color box Suitable for: Computers, TVs, stereos/car speakers, Bluetooth headsets, etc. Packaging size: 145*50*22 Unbelievable Digital Display Bluetooth Adapter Smart 1-to-2/Receiver/Transmitter 2-in-1 High-definition large-screen digital display beyond your imagination ABS material with high-gloss finish for a comfortable feel, not only aesthetically pleasing but also reliable for Active search prevents blind connections to nearby Bluetooth devices, making it easy to see at a glance In transmit mode, it for actively searches for multiple nearby Bluetooth audio devices, displaying Bluetooth pairing names for selection, making operation more intuitive and convenient First-class in-flight listening experience On a long-haul flight, turn on a movie, plug the adapter into your seat's headphone jack, and enjoy the movie with Bluetooth headphones for a truly first-class experience.