A MEMS electrostatic actuator includes a bottom plate affixed to a substrate and a top plate suspended above the bottom plate. The variable resistance layer is formed by stacking a first oxide layer including an oxide of a first transition metal and a second oxide layer including an oxide of a second transition metal which is different from the first transition metal. Images obtained from the video cameras may then be analyzed to determine what golf club dimensions will provide improved results in combination with the golfer’s individual swing characteristics. The receiver further includes a multi-stage low noise amplifier that receives the filtered signals from the filter.