Parrots CK3400LS-GPS is always on and constantly sends the vehicles position to your Smartphone or PDA. Its compatible with most navigation software, including Navigon, Route 66, Tom Tom and Viamichelin. Audio directions are transmitted through the vehicles speakers.the easy-to-read color screen displays your phonebook information, and provides caller ID by number, name and even photo when images are entered into your phonebook. Photos can be used as wallpaper, and personalized features of your mobile phone, such as ringtones, can be synchronizedOnce the CK3400 LS-GPS is installed, simply position your Smartphone or PDA in its cradle, start the engine and youre connected instantly and wirelessly. You can make calls, take calls and access the phone book through voice recognition and voice activation features that allow you to keep your hands on the wheel and your eyes focused on the road, while being able to glance easily at your GPS screen.