Features: brand new and high quality Bluetooth-compatible 5.0 is easy to carry, whether on the road or in the office. The concealed design makes it difficult for you to detect its existence on the computer. Cable-free file sharing, music streaming, video chatting, printing, gaming and more. This portable and lightweight wireless audio transmitter and receiver is an for ideal wireless audio solution suitable for various situations and applications Wide compatibility,for most bluetooth-enabled devices,like Bluetooth-compatible keyboard,headset,speaker,mouse,printer, for smart phone etc. Wirelessly transmit audio from a bluetooth-enabled mobile phone, tablet or computer to a wired stereo, speaker or headset. Specifications: Type:Bluetooth-compatible 5.0 Dongle Color: Black Material: ABS Size；Approx 2x1x1cm/0.78x0.39x0.39in Hardware Interface Bluetooth-compatible 5.0 USB Data Transfer Rate 2.4 GHz Type: Bluetooth-compatible Dongle / Aux Usb Adapter / Bluetooth-compatible Computer Adapter Package Includes: 1 X BT5. 0 Audio Transmitter/Receiver Adapter note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.