Response time is not a problem for the cheaper Harbor Freight DMM, nor the ones from Home Depot. This was a problem in the early days of Radio Shack DMMs with theirs, I believe it is not a concern with faster A/Ds and micro controllers of today. They use the same micro in any 3 1/2 DMM, in a given manufacturers line of models. 73, Stuart K5KVH (economics of scale)