Compact use, fits easily in your pocket and allows a secure grip thanks to the rubberized bi-material case. Built-in 3.7V lithium-ion battery, for longer runtime without changing batteries (~1000 measurements on a full charge). Black display with white font, for better visibility in low light conditions. Laser rangefinder for simple measurement tasks with one-button click measurement. USB charging speed. From completely drained to fully charged charging time 2.5 h. Optimal end-user functions such as: Length measurement, in meters, centimeters, feet and inches. Continuous measurements. Automatic power off after 90 seconds.