Features: User-friendly Split Type Design: with compact size and light weight design, the measurement sensor and main body of the lux meter are detachable, and connected with a retractable spring, you can hold and operate it very conveniently. Wide Measurement Range: with wide measuring range up to 200000LUX, 0.1Lux/0.1FC high display resolution, Lux or FC unit switchable. Light and Sound Alarm: the upper and lower limit alarm values can be set, and the audible and visual alarm prompt will be given once the range is exceeded. Data Hold Function: for conveniently checking the tested data and writing down the results. Clearly VA Color Display Screen: LCD display with backlight, easy for operation and reading the value. Wide Applications: can be used for measuring light intensity in home, office, school, laboratory, warehouse, factory, hospital, hotel, restaurant, airport, etc. More Features: maximum, minimum and average values measurement, 15-minute auto-off, and low battery indication function. Specifications: Material: ABS Range: 999.9/99999/199999x10 LUX, 99.9/999.9/19999 FC Light Sensor: Silicon photo-diode and spectral response filter Sampling Rate: Approx. 8 times/s Incident Angle: 120 Repeated Test Deviation: 2% Spectral Range: 400~700nm Auto-off: 15 minutes Operating Environment: -10~50,