Digital rangefinder Description 1. measuring range: 0.5-18M 2. range resolution 0.01M. accuracy is ± 0.5% 3. temperature measurement resolution of 0.1 ° c, the temperature is 1 ° c measuring accuracy. 4. low-voltage symbol appears when the battery voltage is below 7V. 5. operating voltage: 9V battery. 6. laser wavelength 650nm, Class ' power <1mW level. 7. exterior dimensions: 145*65*35mm 8. automatic power off power-saving features: 60 seconds without any key press will automatically shut down. In off State press the "READ" key to boot into the standby state. 9. the instrument emits a laser beam in the measurement process, by laser beam to the target on the surface, there is a visible point of light can help accurately measured point, make the measurement more accurate.