Digital Luxmeter/Digital Illuminance Light Meter with LCD Display 0.1-50,000 Lux Range Digital light meter luxmeter will allow you to measure the lighting in any area Accurate up to 50,000 lux +/- 5% | Requires one 9V battery for operation (not included) Detachable light sensor allows you to take measurements in any position or space Great for determining the proper exposure for a photograph to help determine shutter speed and f-number Package Contents :1x digital light meter with lcd display