Digital Illuminance Meter LCD Display with Backlight Support Data Hold Illuminance Meter The product is a lx meter. Visible light emitted by fluorescent lamp, metal halide lamp, high voltage lamp or LED lamp can be measured.  Specifications: Model: HT603 Display: LCD Color: Black and Red Shell Material: ABS  Light Measurement: Range: (LX) 1000/10000/200000, (FC) 100/1000/20000 Accuracy: 2854°K LED lamps: ±(3%+5 words)  Other: ±(6%+5 words)  Temperature Measurement: 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℉ Humidity Measurement: Range: 0.0% ~99.9%RH Accuracy:  20%~80%: ±5.0RH  Other: ±6.0RH Cosine Angle Deviation Characteristics: 30°±2%, 60°±6%, 80°±25% Sensor: Silicon photo diode and spectral response filter Operating Conditions: Temperature: 0～40°C, Humidity: <80%RH, Altitude: <2000m Storage Conditions: Temperature: -10～50°C, Humidity: <80%RH Sampling Rate: Approx. 2 times per second Spectral Range: 320～730nm Auto Power Off: 10 minutes Power: 3 x 1.5V AAA batteries ( not included ) Item Size: 14*5.8*2.6cm / 5.51*2.28*1.02in Net Weight: 140g / 4.94oz Packing Size: 18.5*9*5.5cm / 7.28*3.54*2.17in Packing Weight: 212g / 7.48oz