Takes 4.8 or 6 volts..Current draw is 180 MA at any rpm...Makes a 5/8 long spark in air...Don't know parameters..I buy the boards drilled, put the components in the right place, and it works...Lifetime guarantee....Been making these for 15 years, same circuit..I ran a G62 with a 15-8 prop once to test it..Ran 13,000 rpm....Most are put in a mount on the back of the engine..
Can be put in a Radio Shack box, about 1x2x3 inches...Not as small as a C&H....Weighs 3 or 4 oz in the plastic box....
Put one on a restored Whizzer motorbike, and a 289 cc methanol twin race engine..And a 216cc Solo single....
They're all good when they work.....With a couple notable exceptions....