The latest Bluetooth 5.0 version: Compatible with specification version 5.0, backward compatible with Bluetooth 4.2/4.1/4.0/3.0/2.0/1.0. 2. With microphone Hands-free calling while driving clean in RX mode 3. Universal compatibility: This bluetooth 5.0 receiver can be connected to any A/V receiver and any speaker via standard 3.5mm jack or 2 RCA ports, perfect for home theater, stereo and car audio, also for iPhone, iPad, iPod Touch, Smartphones and Android devices. 4. NFC support: Built-in chip, you can directly connect to NFC phone or other NFC bluetooth enabled devices by touching this receiver 5. Play music on 2 speakers simultaneously: With 3.5mm and 2RCA connection options, you can enjoy music wirelessly on 2 speakers. 6. Support dual audio port connection: Equipped with 3.5mm and 2RCA audio ports for more devices (including 3.5mm cable and 2RCA cable). 7. Long-distance wireless connection: The wireless Bluetooth adapter supports connections up to 10 meters / 33 feet to control music playback from a distance. 8. Support automatic on/off: Using the charging cable, connect your car/other power source, and when you start the car or its power source, it will automatically turn on and automatically connect to the last device you connected. When the car is turned off, it will automatically turn off. notes: Note: Please don't worry about the devices on those devices that need to charge themselves, it will have current interference, it will make current noise. Specification: Product name: NFC desktop bluetooth receiver and bluetooth transmitter Size: 6*6*2CM Material: ABS+PC Bluetooth version: BT 5.0 Distance: 10M Working power: DC5V (1-2.1A) Packaging Specifications: 16x10.5x3.3CM Full set with package weight: 130g Compatible: All Bluetooth audio devices,...