K9 USB Car Bluetooth 5.0 Adapter Receiver FM + AUX Audio Dual Output Stereo Transmitter (Black) 1. Bluetooth version: Bluetooth V5.0 2. Body material: PC, ABS 3. Transmission distance: about 10m without barriers 4. Support protocol: AVRCP, A2DP 5. Output: DC 5V2.1A 6. Interface type: USB interface3.5mm interface 7. Basic functions: Bluetooth receiver (RX)Bluetooth transmitter (TX)TF card playbackFM transmitter (adjustable frequency)card readercalllisten to songsnavigation 8. Support equipment: all kinds of speakerscarsTVsdesktop computersnotebookspower amplifiersprojectors, etc. 9. Music format: support APEFLACWAVMP3WMA 10. Memory card capacity: support within 64G (you need to bring your own TF card) 12. Packing list: adapter, manual, 3.5mm audio cable 13. Weight: about 19g 12. Size: about 7.5x2.5x1.5 cm Features: 1. High-definition LED digital display, the use status is clear at a glance 2. Small size, easy to carry, PC fireproof casing of the fuselage, through high-gloss surface treatment process, sturdy and durable 3. No restrictions on car models, plug in the car AUX portFM radio to connect to the Bluetooth of the mobile phone, support listening to songsnavigationcalls 4. Smart compatible devices, support devices with audio inputoutput interfaces 5. Support TF card, plug and play 6. Automatic power-on, four modes can be switched arbitrarily, piano paint material, comfortable touch 7. Built-in Bluetooth 5.0 chip, fast connection speed and stable signal 8. Memory function, automatically connect back after power on, memorize devicemodesongfrequency