Laser Tachometer, RPM Accuracy +/- 0.05 Percent, RPM Resolution 0.001 RPM, Maximum Contact RPM 20, 000 RPM, Calibration Certificate Type NIST, Maximum Velocity Measured 6, 562 fpm, Minimum Velocity Measured 0.16 fpm, Includes Timer and 12 in of T-5 Reflective Tape, Totalizer, Features Auto Ranging/Fixed Decimal (User Selectable), English and Metric Rates, On-Target Alerts, Rubberized Housing, Tripod Mounting Bushing, TTL Pulse Output (Requires Optional 6-Foot BNC Cable). This item has been restricted from sale in the following state (s): []