This tachometer is a high quality instrument to measure the Rotational Speed (RPM) with wide measuring range and high resolution. It is featured with high accuracy measurement, quick measuring time and long detecting distance up to 500 mm (20 inch) with Laser. It is very easy to use by applying a reflective mark (included in package) on target object, then aim at the mark by Laser beam. This tachometer has wide range of applications include measuring rotating speed of machine, motors, model cars, wheels, lathe for metal or wood cutting work etc. Features: Large LCD displaying wide measuring range & high resolution. The use of durable. The last value/min. value will be automatically stored in memory and can be displayed by turn anytime. The RPM of motors and machine parts. The housing has been carefully shaped to fit comfortably in either hand. Digital display gives exact RPM with on guessing or errors. In wood and metalworking, it can be used to accurately measure the speed of a lathe. Specifications Display: 5 digits, 18 mm (0.7¡± inch) LCD with Function Annunciation Testing Range: 2.5 ~ 99,999 RPM (rate / min) Resolution: 0.1 RPM (2.5 ~ 999.9 RPM) 1 RPM (over 1,000 RPM) Accuracy: (0.05 % + 1 digit) Sampling Time: 0.8 seconds (over 60 RPM) Test Range Selection: Automatic Memory: Maximum value, Minimum value and Last Measured value Detecting Distance: 50 ~ 500 mm (2 ~ 20 inch) (Laser) Time base: Quartz Crystal Circuit: Exclusive one-chip of microcomputer LSI circuit Power: 6F22*9V Battery(Included). Features: 100% BRAND NEW. Large LCD displaying. Wide measuring range and high resolution. The use of durable. The last value / min. value will be automatically stored in memory and can be displayed by turn anytime. The RPM of motors and machine parts. Designed to fit comfortably in either hand. Digital display gives exact RPM with on guessing or errors. It is a great tool to measure in wood and metal Specifications: Display: large 5 digits, 18mm LCD. Test select: Automatic. Range: 2.5 to 99,999 RPM Resolution: 0.1 RPM (from 2.5 to 999.9 RPM) 1 RPM (over 1,000 RPM) Accuracy: +/- (0.05% +1 digit) Distance: 50 to 500mm/ 2 to 20 inch Memory: Last Value. Max Value. Min RPM Powered by 1 x Battery 9V (Including for you) Size: 130x70x29mm Weight: About 160g