Support dual stream (TX mode and RX mode), transmission can connect two Bluetooth audio devices and receivers at the same time. The Bluetooth adapter has a memory function and will automatically connect to the device you have paired before when it is turned on. Equipped with an enhanced Bluetooth 5.0 chipset, the Bluetooth transmitter receiver can provide stable audio and CD quality, allowing you to experience true high-definition audio. With low latency, you can watch the video while watching the movie without delay. Note: Low latency needs to support Bluetooth headsets or speakers. Low latency does not support RX mode. Comes with 3.5mm cable and 3.5mm to 2RCA cable, this receiver transmitter adapter can be widely used in your computer, laptop, home stereo system, headset, smart phone, Mp3 player, CD player, etc. The Bluetooth transmitter/receiver uses 5.0 technology to provide more stable, faster transmission, lower power consumption, and at the same time show excellent sound quality. Bluetooth 5.0 with audio adapter, the data transmission rate is twice that of Bluetooth 4.2, and can maintain a distance of up to 10 meters (without obstacl Bluetooth transmitter supporting dual stream (TX mode and RX mode). Receiver mode (RX mode, blue light): Wirelessly transmit audio from Bluetooth-enabled mobile phones or computers to stereo speakers, speakers or headphones. Transmitter mode (TX mode, red light): Wirelessly transmit audio from a non-Bluetooth TV, home audio or CD player to a Bluetooth headset ( to Ai-rpods) or speakers. Model: KN319 Technologies: BT5.0, A2DP, AVRCP (receiver mode only) Operation Range: Up to 10m / 33ft (without any blocking objects) Continuous Use Time: 6 hours (Receiver Mode) / 5 hours (Transmitter Mode) size:4.4 x 4.4 x 1.2cm Material:ABS colour:black Package Contents: 1 x Bluetooth audio transmitter 1 x USB cable 1 x RCA cable 1 x 3.5mm cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.