Specifications:This adapter adopts the latest bluetooth-compatible 5.0 technology, which has the fast transmission speed and can ensure high-quality stereo music.Transmitter Mode (TX): it can wirelessly transfer audio from your non-Bluetooth TV, home stereo system or CD player to your bluetooth-compatible headphones or speakers.Receiver Mode (RX): it can wirelessly transfer audio from your Bluetooth-enabled phone, tablet or computer to your wired stereo system, speakers or headphones.It can be used with computers, TVs, mobile phones, car speakers and so on.Item Name: bluetooth-compatible AdapterMaterial: ABSBluetooth Version: 5.0Technology: BT5.0, A2DP, AVRCP (Receiver Mode Only)Working Range: Up to 10m (No Obstacles)Pairing Name (Receiver Mode): KN330TX: Transmitter Mode, Red LED Light FlashesRX: Receiver Mode, Blue LED Light FlashesFeatures: Plug and Plug, Wireless, Portable, MiniSize: 4.5cm x 2cm x 1.1cm/1.77" x 0.79" x 0.43" (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 3.5mm AUX Cable1 x User Manual