Smartcord for New Uniden DFR6, DFR7, DFR8, DFR9, R1, R3 & R7 units.   LED Operation : LRD850/950 : The Amber LED does not turn on when power is on and flashes only during alerts. DFR6/DFR7 : the Amber LED is lit to show the power is on and also flashes during alerts. Double Click of the mute button during an alert on supported units will initiate a GPS Lockout without having to reach over and use the Mark button.