Non-contact handheld digital tachometer with stable performance. Automatic and manual measurement modes for selection. Wide measuring range (2.5 to 99999 RPM) and high resolution. MAX/MIN values record function. Data hold function, data record and recall (60 readings). LCD screen with white backlight, easy to read. Capable of measuring at a distance from 2 to 20 inches (50 to 500 mm). Auto and manual power off. Low battery indication. Accuracy: 0.02% + 1 digit Sampling Time: 0.5 s (above 120 RPM) Data Storage Capacity: 60 readings Auto Power Off: After 20 seconds Operating Temperature: 0 to 50°C (32 to 122°F) Operating Humidity: 10 to 90% RH Storage Temperature: -10 to 60°C (14 to 140°F) Storage Humidity: 10 to 75% RH Power Supply: 1 x 9V 6F22 Battery (NOT Included) Note: Reflective tape must be attached to the target object before measuring. Do not point directly toward eyes; eye protection is recommended. Do not use near gases or in potentially hazardous environments. Size: 145 x 90 x 35 mm Material: ABS plastic Color: Red + Black Package Contents: 1 x TL-900 Tachometer with reflective tape Only the items listed above are included; other products are not included. Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.