99 Meters Ultra-long RangingThis electronic ruler is equivalent to 9.9m steel tape+99m rangefinder+compass. Millimeter level accuracy, more practical & more accurate. Ultra-long EnduranceWith 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. 99m Super Long Range FinderThis electronic ruler is equivalent to 9.9m steel ruler + 99m range finder + compass. It adopts ultra-low power consumption semiconductor microprocessor with millimeter-level prec-ision, which is more practical and accurate. Other Functions10 sets of historical records are convenient for data query. Measuring tone and measuring breathing light and unit switching (cm/inch). Wide ApplicationSuitable 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-hardness plexiglass and ABS materials, this product features compression 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 Microprocessor: 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). Specifications: Material: Aluminum Alloy + Glass Color: Black Power Supply: 200mAh lithium polymer battery Charging Port: Type-C Standby Time: About 200 days Display Screen: 1.8inch VA LCD screen (white characters on black background) Unit: cm / inch (adjustable) Single Ranging: Up to 9.99 meters Cumulative Ranging: Up to 99.99 meters Accuracy: 0.5%, support stepless adjustment Backlight Time: 30-180 seconds Item Size: Approx. 53*53*15mm / 2.09*2.09*0.59in Item Weight: Approx. 35g / 1.23oz Package Size: Approx. 55*55*16mm / 2.17*2.17*0.63in Package Weight: Approx. 50g / 1.76oz Packing List: 1 * Electronic Ruler 1 * USB Charging Cable