Specification: Name: electronic ruler Material: ABS Unit:CM/IN Standby time:300 days Battery capacity: 260 mAh Use: Widely use in various types of arc cylindrical non-specified surface length measurement Measuring range: 0-199.99m Size: Diameter 5.5cm/2.16 inch Thickness 1.6cm/0.62 inch Description: Easy to use: can be use for distance measurement up to 200 metres, for surface measurement diameter measurement plane measurement flexible object measurement irregular object measurement. High-definition screen display, screen backlight digital clear large screen Durable and long-lasting: USB-TYPE C charging can achieve up to 6 hours of uninterrupted operation, 5 measurement modes switching 10 sets of data cyclic storage, easily meet your daily measurement needs. Multiple measurements: linear measurement, circular measurement, arbitrary curve measurement, irregular surface measurement, cylindrical diameter measurement, accumulation/subtraction of 10 history records, measurement beep, measurement breathing light, unit switching. EASY TO CARRY: Thickness 1.6cm/0.62 inches, weight 65g. it's only 1/3 size and 1/4 weight of a normal tape measure, convenient for you to carry and measure at any time. WIDE APPLICATION: Our digital tape measure has two measurement units cm/in, no matter what measurement unit you are use to. Ideal measuring tool for carpentry, plumbing, building trades or as a tape measure for body, sewing, homework, DIY. package list: 1*electronic ruler