this unit is lightning fast with x band off, k on, ka usa, pop off, tsr off, and lsr off(have blinder m27 jammers and the unit flases in sunlight too much so i shut it off. and this thing picks instant on/quick trigger and eats them up. so many stories to tell but ill get a alert ka band a good 2 miles up and silence then a beep stronger-i know hes running instant on and i let peeps go by me and he was backed up mustang cobra unmarked behind the median brush and had rear facing 34.7 ka instant on and at top of hill pro300 blurred out just like a full laser alert to let u know he nailed you with instant on ka band...really impressed with off axis and i mean outstanding off axis compared to the rx65. and the range is tremendous with the pro300 especially k band increase and ka band sensitive. and losing sws, and no ku band with new lens made for a lightning fast radar and i wonder if i buy the magnum from bel try for 30 days and see and compare with know sources for teasting purposes but i honestly think the bel pro300 usa mode would equal or be within a second to each band detection ikn testing. this based on results and my personal owning the pro300 and know how good it is and see youtube videos with the magnum and my pro300 does equall or better in raw detection. mines the first 633 made so maybe we got a freaky good radar(we i mean me) and its only downfall is laser sun falsing thus i turn this off as i have the blinder m27 working just fine jamming every gun in florida in my neck of the woods.