1. Mini lux meter with stable, safe and reliable measurement. 2. Wide measurement range 0-200,000 lux and automatic/manual range shift. 3. Measuring unit is switchable: Lux or FC. 4. MAX / MIN / Data Hold functions, high accuracy. 5. LCD display with backlight for easy operation in darkness. 6. Low battery indication & Auto power off(cancelable), energy saving. Specifications Photometric range: 0~200000Lux/0~20000FC Accuracy: 4% reading (according to the standard for ordinary incandescent lamps at 285K) 6% reading for other visible light sources Sampling rate: 2 times / sec Sensor: Silicon Photodiode Measuring spectral range: 320~730 Auto range: Yes Auto Shutdown: Yes Maximum and minimum functions: Yes Data retention: Yes Unit conversion: FC/Lux Low voltage prompt: the battery is lower than 6.2 Lighting: Long press HOLD/BL button Power: 9V battery (not included) Dimensions: 192*53.8*35mm Package list: 1*luxmeter 1*English manual 1*black bag 1*box