Long Working Time - Once fully charged, it will work for you for over 20 hours. It's able to connect with 2 phones at the same time, so you could separate work and life. More Function for Wider Use - Not only for car use, it could be used at home or outside as a Bluetooth speaker to play music, or amplify phone sound for the elders. Easy to Use - Easy to operate with concise buttons. Clamp-on design allows it to clip on the sun visor safely and won't drop down. Upgraded mute function ensures the privacy of the phone talking when necessary. Supports Siri and Google Assistant - It's user friendly for someone who like to use voice assistant. Long press the calling button to activate voice assistant of your phone (Such as Siri or Google Assistant), then you could send the voice command. Clear and Loud Sound - Built-in 3w speaker and noise cancellation technology, upgraded microphone system, it provides clear and loud sound quality for phone call, driving navigation or music. Handsfree Phone Talking to Keep Safe - Designed for hands-free talking, let you keep eyes on the road and no need to hold phone, which avoid the transportation accident effectively and keep your safe.