1. Material: Plastic ABS+PC 2. Interface type: 3.5mm 3. Battery capacity: 145mAh 4. Music playing time: 8 hours 5. Continuous talk time: 10 hours 6. Bluetooth version: 5.0 7. Output interface: 3.5mm stereo plug microphone 8. Sensitivity: -42db 9. Frequency response: 50Hz-20KHz 10. Signal-to-noise ratio: 75db 11. Distance: can touch 10m 12. Features: support connecting earphones, mobile phones, speakers and cars 13. Connection: 50cm USB charging cable 14. AUX Adapter: Can pair and link your phone or laptop with your old car stereohome stereo3.5mm wired headphonespeaker 15. Equipped with advanced compatible 5.0 chip, stable connection, fast transmission speed and wide signal range 16. With a built-in microphone, one button to answerhang uprejectredial calls 17. In the fully charged mode, it can play music continuously for about 10 hours 18. It can play music while charging, and it can be used easily even when the battery is low 19. Safe driving, compatible with 5.0 voice navigation 20. After the device is turned on, it will automatically connect to the compatible mobile phone, hands-free callnavigation broadcast, and drive more focused 21. Compatible with 5.0 and support long-distance transmission within 10 meters 22. Press and hold for 3 seconds to turn on the phone, turn on the mobile phone compatible receiver (S-18), click on the automatic connection, the blue light is on, and the next time you use the automatic connection, the S-18 will automatically shut down 3 minutes after the phone is disconnected 23. Dimensions: 50x11.5x48mm 24. Weight: 12.6 grams (Bluetooth receiver + 3.5mm metal stereo plug)