Features:</br> Switch to another mode, you need to insert USB twice in quick succession.</br> 2 in 1 Bluetooth adapter with Bluetooth receive and Bluetooth transmit function.</br> Only one function can be used at a time, and only one Bluetooth device can be connected.</br> Power by USB Charger,PC,Powerbank and other 5V USB devices.</br> Replug and switch mode,Blue light is the receiving mode,Red light is the transmitter mode.</br> Receiver: Fit for Speaker Headphones 3.5mm earphones Car AUX and more 3.5mm input devices.</br> Make your audio entertainment(without Bluetooth) connect with any Bluetooth smartphone; Better sound without wires :</br> Transmitter: Connect to 3.5mm audio output devices such as TV, iPod, CD player, PC, Laptop,MP3 / MP4, and transmit audio to your Bluetooth headsets, bluetooth speaker and other bluetooth receiver.</br> </br> Specifications</br> Model: KN320</br> Technologies: BT5.0, A2DP, AVRCP (receiver mode only)</br> Operation Range: Up to 10m / 33ft (without any blocking objects)</br> Pairing name(Receiver mode ):KN320</br> Transmitter mode: red LED light is on</br> Receiver mode: blue LED light is on</br> Dimensions: 32mmx17mmx8.5mm </br> 3.5mm cable length: 98cm</br> Material: Plastic + Metal</br> Color: Black</br> </br> Note: </br> 1.Transition: 1cm=10mm=0.39inch</br> 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.</br> 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!</br> </br> Package includes:</br> 1x USB Bluetooth Audio Transmitter/Receiver Adapter</br> 1x 3.5mm Aux Cable</br> 1x English User Manual</br>