Product Description Features: The display area and front panel buttons offer convenient operation and easy display of test data. The panel mainly consists of tubes, function keys, and an LED display. The function keys use a micro-touch design. It has multiple power management and protection functions. The lithium battery has overcharge, over-discharge, and short-circuit protection functions, and has built-in intelligent shutdown and low-battery shutdown functions. Due to the high precision of the equipment and the fact that the clamping guide rail and fixing equipment are identical each time, a mining model parallel to the guide rail can be made, resulting in small measurement error and small dynamic fluctuation error. It is mainly used for learning and experiencing the high-speed data processing capabilities of microcontrollers and measuring the flight speed of various objects, such as ping-pong balls, badminton shuttlecocks, darts, etc. The core components adopt industrial-grade packaging, ensuring stable performance. Specifications: Material: Plastic Working Voltage: DC4.2V Measuring Range: 1-999m/s Battery (Built-in): 1 x 3.7V Operating Temperature: -10℃ to 60℃ Speed Measurement Range: 1-999m/s Energy Measurement Range: 1-800J Weight Input Range: 0.1-10g Speed Recording: 40 sets Kinetic Energy Recording: 40 sets Dimensions: Approx. 130x50x75mm / 5.12x1.97x2.95in Notes: Please allow 1-2cm error due to manual measurement. Please ensure you do not mind before ordering. Due to differences in monitors, the picture may not reflect the actual color of the product. Package Includes: 1 x meter