SOAIY S-31 Voice Command Hands-Free Bluetooth System for Car, Bluetooth Car Speakerphone with Car Charger, Auto Power Off Bluetooth Car Kit, Bluetooth Car Phone, Car Bluetooth Adapter Receiver Automatically Power Off  If There Is No Mobile Phone Connected In 180 Seconds,The Device Will Turn Off Automatically and Make Alert Tone,Save Power and Energy. [Activate Siri on iPhone or Android phone commands(Phone dependent)],Make a Call by Siri or other Voice Command.Say Yes To Answer The Incoming Call Or Say No To Decline It After You Hear The Incoming Phone Numbers. Answer, In End, Decline Incoming Calls. Last Call Redial; Incoming Call Number Reading; Play Music From Your Mobile Phones; Advanced Multi-use For Connection To 2 Bluetooth Devices At Same Time, Turn Off Automatically When Bluetooth Connection Is Unavailable, If You Need to Use It Again , Just Press The On/Off Button and Turn It To On .Saving Power And Ensuring Safety. Voice Guidance for Pairing Instructions and Connection Status.Play Music and GPS Via Your Connected Mobile Device. Talk Time Up To 8 Hours; Activate Siri on iPhone or Android phone commands.(Phone dependent)