Car Hands-Free Speaker Phone Multi-Point Visor Speaker for Cell Phones Smartphone Car Charger Hands-Free Bluetooth Car Speaker Features: - Built-in microphone speaker to support hands-free calling; - Unique magnet mount with detachable clip for different positions. ; Magnetic installation, easy to disassemble, car/home use, with lanyard, can be used outdoors; DSP technology achieves noise reduction and echo cancellation; Pair two wireless devices simultaneously; Supports playing MP3/WMA directly from TF card; Support mobile phone navigation voice prompts.;-Bluetooth answer, hang up, reject, redial and other functions.;-Auto power-off memory function.;-Support Bluetooth stereo music playback.;-Voice dialing (supports Android/Apple Siri/Google Assistant); Specifications: 1. Bluetooth version: 4.2+EDR, supports SIRI function (voice dialing function); 2. Bluetooth voice processing: A2DP (Advanced Audio Distribution Profile); 3. Bluetooth frequency: ISM2.4GHz; 4. Rated working voltage: 12V ~24V; 5.Limited working voltage: 8-32V; 6. Support music formats: MP3/WMA/WAV; 7. Support TF card capacity: 1G-32G; 8. Working temperature: 60dB; 10. Distortion: 60dB; 13. Bluetooth transmission distance: 0-10M; 14. Bluetooth microphone effective distance: 0.5-2m; 15. Effective transmission distance: 2m; 16. Built-in rechargeable battery: 3.7V 500mAh; 17. Hands-free battery run time: up to 10 hours; 18. Music playback battery run time: up to 3 hours; Packing list: 1 x wireless car speaker; 1 x USB cable; 1 x manual; 1 x lanyard; 1 x Notice: 1. All pictures are professionally calibrated, but due to ambient light and different display device settings, there may be some deviations in the pictures and items you see, please forgive me. ; 2. The data is measured manually and there may be certain deviations, but it does not affect the use.