Specifications:It adopts bluetooth-compatible 5.0 technology, which is featured with strong compatibility and more stable transmission.2-in-1 design allows you to use it as a bluetooth-compatible receiver, also a bluetooth-compatible transmitter.The adapter is plug and play, and no external power is required.It can be widely used for TVs, computers, headsets, mouses and keyboards.Item Name: bluetooth-compatible AdapterMaterial: ABSBluetooth Version: 5.0 + EDRTransmission Distance: 10m (Barrier Free)Features: 2-in-1, Plug and Play, Wireless TransmissionAdapter Size: 3.3cm x 1.8cm x 1cm/1.30 x 0.71 x 0.39 (Approx.)Audio Cable Length: 57.5cm/22.64 (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x bluetooth-compatible Adapter1 x Audio Cable1 x User Manual