Features:1. Multi-function: OurElectronic Tape Measure has 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, measurement prompt sound, measurement breathing light , Unit switching, etc.; easily cover your various measurement needs.2. 99m Ultra-long Distance Measurement: A single 0-99m practical distance measurement, and a maximum of 99 meters (automatic accumulation) ultra-long distance measurement. 3. Measuring Data - Millimeter-level precision measurement data can be automatically accumulated and subtracted, and 10 groups of historical records can be called at any time, which is convenient and practical.4. Lightweight & 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.5. High-tech Microprocessor: Adopts ultra-low power consumption microprocessor to achieve ultra-long standby and battery life. Q&A1. What can the electronic ruler do?Electronic ruler = 9.9 meters steel tape + 99 meters rangefinder + 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?The power supply of the electronic ruler is a 200mAh battery with a Type-C charging interface, and it has a full battery life of 3000 meters. Using ultra-low power consumption, 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 glasses, which prevents daily scratches and scratches. The gear part is made of nylon with strong hit resistance and super wear resistance, which has a long life.Notice:Actual color may be slightly different from the image due to different monitor and light effect.Please allow 1-3cm deviation due to manual measurement.Shell material: aluminum alloy + siliconeShell technology: fine polishing + matte sandblastingScreen: 1.8 inch VA LCD screen (white characters on black background)Screen cover: 4H super hard glassesSize: D53*T15mmNet weight: 35gSingle ranging: up to 9.99 metersAccumulated ranging: 99.99 meters maximumAccuracy: plus or minus 0.5%, support stepless adjustmentBacklight time: 30-180 secondsBuzzer: on/offBattery: 200mAh, 0.74whCharging port: Tpe-C