Review on General Tools DCFM8906 Digital Display by Thimothy Purnell

Overview: General Tools DCFM8901According to the manufacturer, accuracy is expressed as a percentage of the upper range limit, not as a displayed value. Thus, the claimed accuracy is +/- 138 fpm (6900 x 2%). Since 3% of the displayed value is the minimum expected from decent certified lower-end models these days, at reading speeds below about 60 mph.ft/m6900 Accuracy 2% (78.4 mph) 3450 4% (39, 2mph ) 1725 8% (19.6mph). etc. If anyone at General Tools thinks this review by others at General Tools is wrong, please let them know in the comments: I don't want this product to get an unfair review. Note that 2 other companies using the same design base have also confirmed that their accuracy is % of the upper range limit and not the value shown.