Features: High accuracy speed measurement the TA501A digital tachometer provides precise and accurate speed measurement results, making it idealfor engineers and technicians who require reliable data for motor and engine diagnostics. Optical sensor technology equipped with advanced optical sensor technology, this tachometer can instantly monitors and measure the rotational speed of various objects. Its high precisions ensures accurate readings down to decimalplaces. Suitable for professionals designed for professionals in the engineering and automotive industriesincluding engineers, technicians, and vehicle maintenance personnel. It is an essential tool for motor repair, equipment debugging, and engine parameters measurement. Versatile applications this compact and portable tachometer is widely used in different scenarios such as mechanical manufacturing, laboratory research, and vehicle maintenance. It is perfect for tasks like motor production, bearing quality inspection, physics experiments, and dynamic research. Its lightweight and portable design make it convenient to carry and use in various situations. Specifications: Material:ABS, Electronic Component Size:Approx.15.2x5.5x3.3cm/5.98x2.16x1.29inch Display screen size: 3.7x4.1cm/1.45x1.61inch Model:TA501A Measuring range: 2.5RPM~99999RPM Resolution: 2.5RPM ~ 999RPM(0.1RPM) Above 1000RPM (TRPM) Accuracy: (0.05% reading +1 word) Range: 0 ~ 60℃ Accuracy: 2℃ Speed display: six-digital display, maximum999999. Effective measuring distance: 50mm ~ 500mm. Sampling time: 0.8seconds (above 60rpm) Automaticshutdown: 10 minutes (manualshutdown) Weight: about 115g (excluding battery) Power supply: 3x1.5AAA (R03/LR03) Package Includes: 1x Digital Tachometer note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item.