This compact aluminum-alloy measuring tool delivers accurate, reliable distance and curve measurements for professionals and DIY users who need a small, durable instrument that travels with them. Key benefits Precise results you can rely on: ±0.5% accuracy using an advanced microprocessor and precision encoder. Get repeatable readings for straight lines, circles, arbitrary curves, and cylindrical diameters with an audible beep to confirm each measurement. Long-range capability: single-range measurements up to 9.99 m and cumulative measurements up to 99.99 m. Switch easily between centimeters, inches, and feet to match your job or project. Truly portable: slim aluminum alloy body (53 × 15 mm / 2.09 × 0.59 in) and only 30 g — fits in a pocket or tool pouch for fieldwork and travel. Practical, job-ready functions: stores up to 10 records in history memory; supports totalization and subtraction calculations so you can add or subtract measured lengths without pen and paper. Low-light friendly: adjustable backlight timer (30–180 seconds) plus a breathing light indicator for quick status checks in dim environments. What it does (features at a glance) Measures: straight lines, circles, arbitrary curves, cylindrical diameters Accuracy: ±0.5% with precision encoder and microprocessor control Range: single measurement to 9.99 m; accumulative up to 99.99 m Units: centimeters, inches, feet (selectable) Memory: 10-record history; totalization and subtraction functions Alerts: audible beep confirmation; breathing light indicator Display: adjustable backlight (30–180 s) Size & weight: 53 × 15 mm (2.09 × 0.59 in), 30 g Body: slim aluminum alloy for durability and lightweight carrying Practical use scenarios On-site construction and renovation: Quickly measure room perimeters, door and window openings, and straight lines, then store and total multiple measurements while moving across the site. Plumbing, HVAC, and pipework: Measure cylindrical diameters and curved surfaces with consistent accuracy to confirm pipe sizes and clearances. Carpentry and layout work: Track lengths along straight and curved edges, accumulate several segments into one total, and switch units to match plans or client preferences. Why this tool stands out Combines laboratory-grade measurement accuracy with a rugged, pocket-ready aluminum body. Designed for real-world workflows: memory for multiple readings, add/subtract totals, audible confirmation and visual indicators make it efficient on busy job sites and in low light. Simple unit switching and a wide cumulative range avoid repeat trips and manual conversions. Included functions and limitations Supports straight line, circle, arbitrary curve, and cylindrical diameter measurement modes. Measures up to 9.99 m per single pass and can accumulate measurements up to 99.99 m. Memory holds up to 10 past measurements for quick recall and calculation. Use this compact, accurate measuring tool when you need dependable readings, easy portability, and practical features that save time on the job.