【Bluetooth Receiver & Transmitter 】 Universal Bluetooth audio adapter enables your traditional TV and other Non-Bluetooth equipment to transmit audio to your Bluetooth headphones/ speakers, or enables your Non-Bluetooth home stereo to receive the wireless music streaming from your phone and tablet. Only connect one device at a time. | 【Upgraded Bluetooth Transmitter】 When the USB charging data cable is plugged into the computer, it can be used as a transmitter to transmit audio, enabling the computer to have Bluetooth function. If the computer's USB interface is USB 3.0, after the computer is turned off, the computer's USB interface can still supply power to the transceiver and maintain the paired connection state. | 【Hands-Free Calling】Built-in sensitive microphone, providing a simple hands-free solution for answering and receiving phone calls while driving. And with updated V5.0 EDR technology, Bluetooth connection is more stable and wireless range is up to 50 feet, makes catching up with family or friends a breeze. | 【Easy to Use】During specific mode, you can control play/pausing or volume on the adapter. Bluetooth transmitter and Bluetooth receiver designed with a slider switch, you can switch between TX and RX mode with one key which is easy to set up. And support automatically re-connect function. | 【Built-in Rechargeable Battery】All day audio transmission, built-in 300mAh battery serves you about 7 hours on transmitter mode and 10 hours on receiver mode after 1 hour of full charge. Support using while charging.