This electronic ruler is equivalent to 9.9m steel tape+99m rangefinder+compa, suitable for straight line measurement, arc measurement, arbitrary curve measurement, irregular surface measurement and cylinder diameter measurement in daily life and work.Features:- Compact & Portable: 1.5cm slim body, 5.3cm surface diameter, 30g light weight, convenient & practical.- Quality Materials: Made of high-quality 6063 aluminum alloy, high-hardne plexigla and ABS materials, this product features compreion resistance, scratch resistance and impact resistance, much more durable & longer service life.- High Definition LCD Screen: Display measuring results much clearer.- Ultra-low Power Semiconductor Microproceor: More accurate measurement & longer service life.- 99 Meters Ultra-long Ranging: Millimeter level accuracy, more practical & more accurate.- 10 Groups of Historical Records: Convenient to query data.- Ultra-long Endurance: With the built-in 200mAh low internal resistance lithium polymer battery, once fully charged, it can achieve ultra long standby up to 200 days. Charge for 5 minutes and last 2 hours.- Other Functions: Measuring prompt sound & measuring breathing lamp & units switching(cm/inch).- Wide Application: Suitable for straight line measurement, arc measurement, arbitrary curve measurement, irregular surface measurement and cylinder diameter measurement in daily life and work.Specifications:Material: Aluminum Alloy + GlaColor: BlackPower Supply: 200mAh lithium polymer batteryCharging Port: Type-CStandby Time: About 200 daysDisplay Screen: 1.8inch VA LCD screen (white characters on black background)Unit: cm / inch (adjustable)Single Ranging: Up to 9.99 metersCumulative Ranging: Up to 99.99 metersAccuracy: 0.5%, support steple adjustmentBacklight Time: 30-180 secondsItem Size: Approx. 53*53*15mm / 2.09*2.09*0.59inItem Weight: Approx. 35g / 1.23ozPackage Size: Approx. 55*55*16mm / 2.17*2.17*0.63inPackage Weight: Approx. 50g / 1.76ozPacking List:1 * Electronic Ruler1 * USB Charging Cable