A system and method for determining the true electrical characteristics of a device. The method involves automatically learning phrase features for classifying questions into different types, automatically generating candidate query transformations from a training set of questionanswer pairs, and automatically evaluating the candidate transforms on information retrieval systems. A tool strip has spaced ends attached to the outer side of the finger strap whereby an opening between the strap and strip can receive a pencil or other tool. The first reflecting member is arranged in the first holder and has a first reflecting surface for reflecting and directing the light converged by the first lens module to the first image sensor.