Model TA636A Measurement Method: Integral type Range: 0.1~200,000 LUX / 0.01~20,000 FC Measuring Levels: 200 / 2,000 / 20,000 / 200,000 LUX; 20 / 200 / 2,000 / 20,000 FC Accuracy: ±(4% + 10 digits) calibrated under standard incandescent lamp at color temperature 2856K Resolution: LUX < 200: 0.1 LUX ≥ 200: 1 FC < 20: 0.01 20 ≤ FC < 200: 0.1 FC ≥ 200: 1 Display: 4-digit, max reading 1999 Light Sensor: Silicon photodiode with filter Sampling Rate: 2 times per second Incident Angle: 120° Repeated Test Deviation: ±2% Spectral Range: 400~700 nm Auto Power Off: 15 minutes (can be disabled) Operating Environment: -10°C to 50°C, Max 80% RH, indoor, altitude < 2000m Storage Environment: -10°C to 50°C, Max 70% RH (battery removed) Product Dimensions: 150 x 56 x 28 mm Weight: Approx. 150g (battery not included) Power Supply: 2 x 1.5V AAA (RO3/LR03) batteries Package Includes: 1. Color box 2. Main unit 3. Cloth bag 4. Instruction manual 5. Protective cover