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 ( or ).3. Ambient Humidity and Temperature: In addition to measure visible light, it can measure the environment humidity and temperature.4. Compact Size: Mini meter with stable, safe and reliable measurement. Light and compact, so you can hold and carry it conveniently.5. Auto Off: The meter has an automatic off feature that conserves battery energy. After 10 minutes the meter automatically shuts off.Brand: Model: HT603Display: LCDLight Measurement:Range: () 1000/10000/200000, () 100/1000/20000Accuracy:2854K incandescent 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: 1.5/3.0Humidity Measurement:Range: 0.0% ~99.9%RHAccuracy: 20%~80%: 5.0RH Other: 6.0RHCosine Angle Deviation Characteristics: 302%, 606%, 8025%Sensor: Silicon photo-diode and spectral response filterOperating Conditions: Temperature: 0~40C, Humidity: Less than 80%RH, Altitude: Less than 2000mStorage Conditions: Temperature: -10~50C, Humidity: Less than 80%RHSampling Rate: Approx. 2 times per secondSpectral Range: 320~730nmAuto Off: 10 minutes: 3 x 1.5V AAA batteries ( not included )Item Size: 14x5.8x2.6cm / 5.51x2.28x1.02inColour:black+redMaterial:ABSPackage Contents:1 x Digital Meter1 x Cloth Bag1 x Manual ( English )Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.