Description: Functions: Outside measuring, inside measuring, step measuring and depth measuring Range: 0~150mm/6" Accuracy: ±0.2mm/±0.01" Resolution: 0.1mm/0.01" Repeatability: 0.1mm/0.01" Maximum measuring speed: 1.5mm/sec, 60"/sec 2 Power: When light brightness is over 200 LUX, the solar board will supply power; when light brightness is under 200 LUX, the 3V battery will supply power. Operating temperature: 0~+40℃ Storage temperature: -20~+70℃ Influence of humidity: Not important within 0 to 80% of relative humidity. Included: 1 x Solar Digital Caliper