Okay at this point I think I need to clarify things so everyone is on the same page, the models from hkhangsen are as follows.
ECHO is a automatic use's 901
threading , and is available in black , silver or chrome , in 650mah or 1300mah
ECHO-E is an manual and is compatable with ego parts and is in the same color and in 650mah,1100mah and 1300mah
as for the ECHO-v i have not seen one and won't try to tell you what i do not know!!!!
the led on the ends of the black auto echo's are redish orange and on the silver and chrome they are blue.
As for the ECHO-E I am unsure of what color the button led is as I have not received mine yet, as they wont be shipping those until friday as they were out of stock and in the middle of a production run.