TACHOMETER Product Description Features:  Wide measurement range and high resolution 40 readings memories Built-in laser pointer 5 digits LCD display Specifications: Model: AT-8 Contact test range: 2 to 20,000 RPM Non-contact test range: 2 to 99,999 RPM Tot test range: 1 to 99,999 RPM Accuracy: +/- (0.05% + 1digit) Resolution: 0.1RPM(2 to 9999.9RPM); 1RPM (over 10000 RPM) Sampling time: 0.5 sec.(over 120 RPM) Detecting distance: 50mm to 500mm Time base: Quartz crystal Power consumption: Approx.45mA Battery: 9V (Not included) Package includes: 1 * AT-8 digital multimeter