The Pama Safeline DSP Car Kit boasts the latest technological advancement of any handsfree system in its class... D.S.P. Digital Signal Processing technology for enhanced Audio Reception and Clarity of speech. This coupled with it s multi voltage operation for both commercial and private vehicles make this an exceptional handsfree solution for any user. The kit can be installed by anyone with a rudimentary knowledge of car kits as it can be powered from the vehicles cigarette lighter socket all that is needed is for the cradle to be fixed where it can be seen without risk The Safeline D.S.P. kits boast the following features 12 24 volt operational range Simple Plug N Go Operation Optional Radio Mute Facility ( requires installation ) D.S.P. Audio enhancement for clear conversations No dedicated cradles to worry about the connectors fit a range of handsets. Bluetooth Option available The kit can be hardwired for a professional finish