http://goo.gl/NRZDdi - In Car DVD Player has an External microphones, built-in mic and external mic, clear voice to be heard with a better sound quality, Can attached to the car driver's sun visor. Support bluetooth connection for iPhone 3G / iPhone 3GS / iPhone 4 / iPhone 4s / iPhone 5 , connects to mobile phone for hands free function (make and receive call through the system.