No this is a constant power. I prefer this because I hate having to turn the radar detector on when I have some short stops. Also I know that this was the case on my E53 and my E60 but I am not sure about the E70. The constant power only works for about 15 min before the car completely powers down and there is no constant power. I am testing this currently on my E70 to see if that is the case.

My solo S2 is battery powered and I got so used to just powering the Radar Detector down when I was leaving the car that it has become second nature but I will let everyone know what my findings on auto off when the car sits for a period of time.

Michael

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2012 X5 50i ZAP(2VA, 336, 465), ZTP, ZPP, ZPS(6VC), ZCW, ZRC, 322, 4UB, 4NC, 610
2011 ///M3 Silverstone II
2011 X5 50i(lemon)
-- SOLD --
08 550 Msport
07 X5 4.8I sport
04 545i sport
02 4.4i sport
01 540I M/sport
00 SL500
97 SL500