Powerful Laser Tachometer works up to 25 feet off of reflective tape (included). Even works off of contrasting colors. Perfect for quick, accurate speed measurements. Comes complete with RCA (Remote Contact Assembly) for contact readings of rotating parts. PLT-200 can power an optional Remote Optical Sensor (ROS-P) and provides a TTL output for triggering data collectors and DAQ devices. Comes with a FREE traceable N.I.S.T. certificate of calibration-a $95.00 value. The Kit is complete and ready to use. Made in China assembled in the USA.