True Bluetooth-Compatible 5.4 chip for anti-interference and long-distance dual upgrade. Plug and play - no driver required, working status indicated by a clear blue light. HiFi lossless transmission for three-dimensional, delicate, and pure sound quality. Connect up to 7 devices simultaneously for seamless multi-device usage. Enjoy high-quality, clear sound with easy setup and reliable performance. Item Name: Adapter Material: Metal, ABS Bluetooth-Compatible Version: 5.4 (BLE Low Power Consumption, Low Latency) Transmission Distance: 20 Meters (barrier-free Environment) Supported Protocols: A2DP, HSP, AVRCP, HID, ACC, Etc. Working Temperature: -20 to 70℃ Features: Anti-interference, Plug Play, Low Latency Size Details: L: 2.5cm/0.98", W: 1.7cm/0.67", H: 0.8cm/0.31" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Adapter 1 x User Manual