Item Type: Receiver/Transmitter Input Voltage: DC 5V Transmission Distance: Approx. 15m/49.2ft Bluetooth Version: Bluetooth 5.0 Product Color: Black Application: Computer, TV, projector (transmitting mode), speaker, earphone (receiving mode) Package List 1 x Receiver/Transmitter 1 x Audio Cable 1 x User Manual 1Bluetooth 5.0, more powerful compatibility, faster and more stable signal transmission, not stuck when listening to music. 2Receiver and transmitter 2-in-1 design, one-button switching between two signals, easy to use. 3Connect computer to Bluetooth headset/speaker with the adapter and enjoy a music range of 15 meters. 4Instantly become a Bluetooth speaker. Just plug it in, the traditional speaker is immediately full of blood and resurrected. 5If your car Bluetooth is broken or there is no Bluetooth, just plug it in and you can use it.