1.Clear Loud CallsSounds From This Durable In-Car Speakerphone Comes Through Loud And Clear Thanks To High Volume And Advanced Noise Reduction.^2.Superior Voice Input Hd Voice Microphone & Bluetooth V4.1+Edr Tech Capture The Exact Human Voice, Offer Fast&Clear Voice Transform. Your Voice Will Be Heard Clearly Without Any Delay.^3.Noise Cancellation Panel Cambered Panel With 574 Dense Holes - Echo Cancellation Further Enhances The Clarity Of The Sound. Makes The Voice From The Other Party Softer And Clearer.^4.Serious Battery Life A Road-Trip Worthy Battery Offers You Up To 25 Hours Of Talk Time And 450 Hours On Standby. Car Bluetooth Speakerphone Holds All Of Your Important Conversations, Even On The Longest Hauls.^5.Easy Setup&Operate Pair Visor Bluetooth To Your Cellphone And Place It On Your Vehicle Sun Visor Within Seconds. Pretty Easy To Operate With Big Button - Key Point Of Your Safe Driving.