XUEMEI Up to 10 practical functions such as straight line measurement, round measurement, arbitrary curve measurement, irregular surface measurement, cylindrical diameter measurement, accumulation/subtraction of 10 historical records, measure fast sound, measure breath light, unit switching, etc.Easily cover your various measurement needs. 99m Ultra-long distance measurement A single 0-99m practical distance measurement and a maximum of 99 meters (automatic accumulation) ultra-long distance measurement. Measurement of data millimeter-level precision measurement data can be automatically accumulated and subtracted, and 10 groups of historical records can be called up at any time, which is convenient and practical.Light and portable 15mm in thickness and 30g in weight. It is only 1/3 the size of an ordinary tape measure and 1/4 the weight, which is convenient for you to carry and measure at any time.High-tech microprocessor Adopts ultra-low power consumption microprocessor to achieve ultra-long standby and battery life. Size 53*T15mm (2.09 X 0.59 INCH) QA1. What can the electronic ruler do? Electronic ruler = 9.9 meter steel tape + 99 meter range finder + tape + soft ruler ten compasses. You can use it to complete plane measurement, curved surface measurement, irregular surface measurement, circumference diameter measurement, etc. in daily life and work.2. How long is the battery life and is it expensive to use? Powering the electronic ruler is a 200mAh battery with a Type-C charging interface, and it has a full battery life of 3000 meters.With ultra-low power consumption, the standby time is about 200 days.3. Is it durable and drop resistant? The fuselage is 6063 aluminum alloy, which is resistant to compression and construction. The screen is made of high hardness plexiglass, which prevents daily scratches and scuffs. The gear part is made of nylon with strong impact resistance and super wear resistance, which has a long service life. Shell material: aluminum alloy + silicone Shell technology: fine polishing + matte sandblasting Screen: 1.8 inch VA LCD screen (white characters on black background) Screen protector: 4H super hard plexiglass Size: D53 * T15mm Net weight: 35g Single speed: up to 9.99 meters Accumulated range: 99.99 meters maximum accuracy: plus or minus 0.5%, support stepless adjustment background time: 30-180 secondsBuzzer: on / off Battery: 200mAh, 0.74wh Charging port: Type-C 1 x Electronic tape measure 1 x USB cableThe gear part is made of nylon with strong impact resistance and super wear resistance, which has a long service life.Product Quantity: 1pcsProduct color: black