Feature:1. The advanced for CSR 5.0 chipset combined with the A2DP offers stable connectivity and excellent signal stability. The uninterrupted and clear HiFi music stream provides a pleasant listening experience. The 3.5mm AUX or for RCA audio connector is ideal for wired headphone/speaker, home sound system, car stereo and portable nonBluetooth devices.2. The transmitter function converts the 3.5mm audio output media device into a Bluetooth device capable of transmitting Bluetooth audio. The receiver allows a nonBluetooth device, such as a car or home stereo, to receive highquality audio. Switch between transmitter and receiver mode with the flick of a switch. Easy connection using advanced Bluetooth technology and 3.5mm audio cable (attached).3. In receiver mode, you have full control over the music, including play/pause, track selection, and volume control, through buttons on the adapter control. The adapters can connect to traditional devices like wired headsets or speakers, so they can receive Bluetooth music directly from phones and tablets.4. Simply slide the switch to ON/FF and plug the 3.5mm audio connector of this wireless music adapter into the 3.5mm / 2.5mm 2RCA port for use in car/home audio systems, nonBluetooth home speakers and headsets, pair with Bluetoothenabled devices to enjoy music and automatically repair for easy pleasure.5. With the accompanying 3.5mm cable and 3.5mm to 2RCA cable, this receiver transmitter adapter is widely used for your computer, laptop, home stereo system, headphones, smartphone, Mp3 player, CD player, etc.Specification:Condition: 100% Brand NewItem Type: Bluetooth Receiver TransmitterMaterial: ABSColor: As Pictures Shown Weight: Approx. 76g/2.7ozModel: KN321Technology: BT5.0, A2DP, AVRCP (receiver mode only)Operating Range: Maximum. 10m/32.8ft (without any blocking objects)Pairing Name: KN321Charging Time: 2 hoursBattery Type: Polymer Lithium BatteryBattery Capacity: 200mAh.Package List:1 x Bluetooth 5.0 Receiver Transmitter1 x Micro USB Cable1 x For RCA Cable1 x 3.5mm Cable1 x Manual