Feature: -Built-in MIC speaker, supporting hands-free call; -Unique Magnet Mount with detached clip suitable for different position .; -Magnetic suction installation, easy disassembly, vehicle / home use, with a hanging rope, can be used outdoors; -DSP Technology to reach Noise reduction and echos cancellation; -Pairing two Wireless-enabled devices simultaneously; -Support MP3 / WMA playback from TF Card directly; -Support mobile phone navigation voice prompt .; -Bluetooth answer, hang up, reject, redial and other functions .; -Automatic power off memory function .; -Supports bluetooth stereo music playback .; -Voice dialing (support android / apple Siri / Google Assistant); Specification: 1.Bluetooth Version: 4.2 + EDR, support SIRI function (voice dialing function); 2.Bluetooth voice processing: A2DP (Advance Audio Distribution Profile); 3.Bluetooth Frequency: ISM2.4GHz; 4.Rated working voltage: 12V ~ 24V; 5.Limit operating voltage: 8-32V; 6.Support music format: MP3 / WMA / WAV; 7.Support TF card capacity: 1G-32G; 8.Operating temperature: &lt;70 degrees; 9.Signal to noise ratio:< 60 dB; 10.Distortion: &lt;0. 1%; 11.Frequency response: 20Hz-20KHz; 12.Left and right channel separation degree:< 60dB; 13.Bluetooth transmission distance: 0-10M; 14.Bluetooth microphone effective distance: 0.5-2m; 15.Transmission effective distance: 2m; 16.Bulid-in Rechargeable Battery: 3.7V 500mAh; 17.Hands-free Battery Run Time: up to 10 hours; 18.Music-play Battery Run Time: up to 3 hours; Package included: 1x Wireless In-car Speakerphone; 1x USB Cable; 1x Manual; 1x Lanyard; Note: 1. All pictures have been professionally calibrated, but due to the ambient light and different display device settings, the pictures and items you see may have some deviations, please forgive me. ; 2. The data is manually measured, there may be some deviations, but it does not affect the use. ;