1, 2 in 1, bluetooth receiver and transmitter all in one, easy switch.

2, TX mode pair with Bluetooth earphones, send audio from a wired headphone jack, such as on a TV, PC, or airplane, treadmill at the gym, to your Bluetooth earphones/ Bluetooth speakers.

3, RX mode pair with mobile phones, receive Bluetooth audio from a device(such as phone, tablet, PC, etc.) and send it to the AUX-lN port of a connected stereo(such as in a car/boat, 3.5mm wired earphone, speaker, etc.)

4, Build in mic, answer hands-free calls in RX mode.

5, Noise cancellation tech for superb call quality.

6, 3.7V 150mAh Battery inside, up to 7 hours long play time.

7, Slide button to switch RX or TX mode, inuitive and convenient.

8, Bluetooth V6.0 low power consumption.