Mastech MS6610 3-RANGE Lux meter, Brightness Meter, Sold By Sinometer ABS and Archly Plastic Imported Professional Lux meter with high resolution and good accuracy Wide range measurement from 0 to 50,000 lux Automatic zero adjustment, low battery warning & data hold pocket size and light, easy to carry 30-day Money Back Guarantee & 1-Year Manufacturer's Warranty