ABOUT AOFAR: Nearly twenty years, AOFAR focus on the research and development of outdoor products especially in range finder and compass, AOFAR has first-class production technology and R&D experts. Nowadays, our products is selling all over the world and very popular. We dedicate to improve customer's outdoor life by rich experience and expertise. CHOOSE AOFAR! ENJOY LIFE! Features: High accuracy, short measuring time, low power consumption, automatic power-off Portable optoelectronic device, waterproof Specification: Laser type:905nm Measuring range of distance:5-700yards Measuring range of speed:0-300km/h Magnification:6x Eye piece size:16mm Exist pupil diameter:3.8mm Range measure accuracy:±1yard speed measure accuracy ±5km/h Net weight:180g Dimensions:110*75*45mm Battery:CR2-3V Operating temperature:-10°C~50°C Package including: 1 Laser rangefinder 1 User manual 1 Battery 1 Lanyard 1 Carabiner shape 1 Carrying pouch 1 Cleaning cloth