This unit has been dis-continued by the manufacturer.
Handheld Remote Control Head Plug & Play (Comes with KAA0629C Install Kit) Purchase the Rear mount radio (KNGM R), and this option and you have a complete unit.
The New KAA0670 Handheld control head with touch screen LCD display features radio controls for on the head/microphone including- volume, channel select, soft keys, emergency button, etc. You can switch the LCD display between portrait or landscape viewing (depends on orientation). The LCD screen is a touch screen…..just like the KNG dash mount mobile radios. The KAA0670 has an internal speaker, there is audio at the microphone. The LCD display can be customized to several different formats. Pull it out the window and have control of your radio from outside the vehicle.