TACHOMETER The Extech Mini Laser Photo Tachometer Counter is used for taking non-contact RPM measurements. The reflective tape can be used on objects to be measured and point the integral laser for testing. The laser pointer beam provides greater accuracy and longer measuring distances for photo tachometer measurements. The meter features a rugged double molded housing for better grip. Specifications:  RPM range: 2 to 99,999rpm Count range: 1 to 99,999rev (revolution) Resolution: 0.1rpm, 1rev Basic accuracy: +/-0.05% Max target distance: 1.6ft (500mm) Memory: min/max/last Dimensions: 6.2x2.3x1.6" (160x60x42mm) Weight: 5.3oz (151g) Warranty: 1 year