The product is a lux meter. Visible light emitted by fluorescent lamp, metal halide lamp, high voltage sodium lamp or incandescent lamp can be measured. Features: 1. LCD Backlight Display: LCD display with backlight for easy operation in darkness. 2. Practical Functions: Support data hold / Max / Min / temperature unit selection ( or ) / unit selection ( Lux or FC ). 3. Ambient Humidity and Temperature: In addition to measure visible light, it can measure the environment humidity and temperature. 4. Compact Size: Mini lux meter with stable, safe and reliable measurement. Light and compact, so you can hold and carry it conveniently. 5. Auto Power Off: The meter has an automatic power off feature that conserves battery energy. After 10 minutes the meter automatically shuts off. Note: 1. Due to manual measurement, the size may be slightly different. Thank you for your understanding. 2. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object. Specifications: Brand: HABOTEST Model: HT603 Display: LCD Color: Black & Red Shell Material: ABS Light Measurement: Range: (LUX) 1000/10000/200000, (FC) 100/1000/20000 Accuracy: 2854K incandescent lamps:(3%+5 words) Other: (6%+5 words) TemperatureMeasurement: Range:-20.0~60.0 (-4.0~140.0) Accuracy: 0.0~45.0 (32~113): 1.0/2.0 Other: 1.5/3.0 HumidityMeasurement: Range:0.0% ~99.9%RH Accuracy: 20%~80%: 5.0RH Other: 6.0RH Cosine Angle Deviation Characteristics: 302%, 606%, 8025% Sensor: Silicon photo-diode and spectral response filter Operating Conditions: Temperature: 040C, Humidity: