The Sekonic ILLUMINOMETER i-346 Light Meter is a small, lightweight, and easy-to-use meter for measuring light in lux or footcandles?it?s an excellent choice for monitoring light levels in the workplace and other environments. The i-346 can take reflected measurements in any one of three modes: single, continuous, or delayed up to 60 seconds (when reflections from the operator may affect the measurement). The results can be displayed in lux or footcandles on the large LCD display screen. One AA battery powers the i-346 for up to 20 hours. When not in use, it automatically switches off after 4 minutes. Not designed for photographic work. What?s in the Box? Sekonic i-346 ILLUMINOMETER Soft case Operating manual Strap Metering Type Sensor: SPD Measuring System: Illuminometer Indecent light: fixed head Measuring Range and Modes Measuring Modes Ambient Light: Lux/FC Measuring Range (ISO 100) Ambient Incident Light: 2.50 lx to 200,000 lx, 0.23 to 18,600 FC Custom Settings: Yes (1 custom setting) Physical Operating Temperature:0 to 40 deg. C Storage Temperature:-20 to 60 deg. C Power source:1.5V x 1 (AA battery) LCD: B&W, Segment type Weight (lbs.):0.20 Weight (KG): 0.0907 Product Depth Inches:4.30 Product Width Inches:2.50 Product Height Inches:0.90 Product Depth Centimeters:11.00 Product Width Centimeters:6.30 Product Height Centimeters:2.20 Product Metric Weight Grams:90.70 Item Includes Operating Manual, soft case, strap Synchro terminal cap