【Bluetooth Audio 5.0 Adapter】the use of low latency technology, real-time audio transmission, improve the quality of audio. Compatible with Android/OS system phones, tablets and speakers with audio incoming interfaces. Note: If your Bluetooth version is lower than 2.1 or 3.0, it causes delay in signal transmission. 【Easy to Use】It can simply switch between transmitter (TX) and receiver (RX) mode. Provides rich and deeper sound experience. Enjoy CD-like audio quality. We recommend that you do not use this product while charging because the current may cause noise (in transmission mode). 【High Performance and Compatibility】Built-in high capacity lithium-ion batteries, this ensures that the adapter can be used for more than 8 hours for each fully charged charge. It is the perfect wireless audio solution for various devices: Windows Phone, Android, Phone 6, Phone 6 Plus, Samsung Bluetooth Galaxy Note 4's A2DP profile, Galaxy S5, Kindle, etc. 【Bluetooth Transmitter】Used to receive and transmit，add wireless function to your TV , PC , MP3 , DVD player to enjoy music sounds wirelessly.（Signal can be transmitted ten meters）