Features: This portable, wireless audio transmitter and receiver is a good wireless audio solution for a wide range of situations and uses Transmitter mode are wirelessly streams audio from your non-Bluetooth TV, or CD player to your Bluetooth headphones Receiver mode wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones If the device has been in a mode for a long time, it needs to be re-energized twice to switch to another mode. With the included 3.5mm cable, it can widely be used on your computer, laptop, home stereo system, headphone, smartphone, Mp3 player, CD player, etc. Specifications Material: ABS Color: black Size(L x W x H): about 4.8 x 2.2 x 1 cm Model: X01 Technologies: BT5.0, A2DP, AVRCP (receiver mode only) Operation Range: Up to 10m / 33ft (without any blocking objects) Pairing name(Receiver mode ):X01 Transmitter mode: red LED light is on Receiver mode: blue LED light is on Package Include 1pc x Audio Transmitter Receiver 1pc x 3.5 mm cable 1pc x user manual Note: Please allow 0-1 cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.