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Specifications Of Digital Protractor Angle Gauge Finder: Measuring range: 4*90° Resolution:0.1°/0.01% Repeatability:±0.1° Working temperature: 32℉-104℉(0℃-40℃) Relative Humidity: 40%-80% Battery type: 3V CR2032×3 Dimension: 2*2*1 inch(52*52*26mm) Upright LCD display,and direction symbol Warm Tips: 1. Don't clean this precision device with organic solvent. Keep it away from water and corrosive. 2. Don't hurt the unit's working surface. Get rid of any dirt on it with soft cloth in order to keep its accuracy. Package contents: 1 * FstDgte Mini Digital Protractor Angle Gauge Finder 1 * Carrying Bag 1 * User Manual