1、Illuminometer (or luxmeter) is a special instrument for measuring illuminance. 2、Photosensitive probe cover: can prevent probe from damage, good protective effect. 3、Personalized clamshell battery slot: powerd by 9V battery (not included); the instrument has automatic shutdown function, long-term use, energy saving and environmental protection. 4、Backlit display: LED-backlit large screen for accurate and easy reading. 5、Soft buttons: rubber material, comfortable handle, easy to use for a long time. Features: Illuminometer (or luxmeter) is a special instrument for measuring illuminance. Photosensitive probe cover: can prevent probe from damage, good protective effect. Personalized clamshell battery slot: powerd by 9V battery (not included); the instrument has automatic shutdown function, long-term use, energy saving and environmental protection. Backlit display: LED-backlit large screen for accurate and easy reading. Soft buttons: rubber material, comfortable handle, easy to use for a long time. Widely used in homes, office buildings, warehouses, production lines, farming / aquaculture, stage, stadiums and other fields. Specification: Brand: SMART SENSOR Model: AS823 Measuring Range 1~200.000lux Accuracy: <3 rgd±5rf.s; ±(4rgd±10dgts) if < 10000lux Unit Selection: lux / FC Measure Selection : Auto Repeatability ±2 Sampling Frequency 1.5 time/sec Resolution:1lux 0.1C Data Hold Function: Yes Backlight Display: Yes Max Min Measuring: Yes Auto Power Off: Yes Temperature Measuring: Yes Operation Condition -0℃~50℃; ≤80RH non-condensing Storage conditions -10℃~50℃; ≤70RH non-condensing Power: 9V battery (NOT included) Size: 220 * 65 * 30mm / 8.7 * 2.6 * 1.2in Package List: 1 * Photometer 1* Instructions 1* Plastic Box 1* Split Type Probe