Atill Wireless Bluetooth Transmitter and Receiver, 2-In-1 Bluetooth Adapter with 3.5mm Stereo Output Connect Headphones TV Car kit iPhone iPad iPod PC. Paired with Bluetooth Dongle Bluetooth-enable all 3.5mm media devices (enable Bluetooth receiving: speakers, headphones and more; enable Bluetooth transmission for: MP3, CD / DVD players, e-readers, TVs and more). Simple one-button switch to shift between transmitter(TX) and receiver(RX) mode. Note: This device has the function of receiver and transmitter. Extra-long built-in battery provides up to 10 hours playing time and only need 1.5 hours to charge it fully Two-link: can connect two Bluetooth devices at the same time. Over length receiving distance, can reach up to 30 feet in open space without cables. Package contents: Atill Bluetooth Transmitter and Receiver, 3.5mm audio cable, micro USB cable, instruction manual.