Pyle PLMT12 Handheld Lux Light Meter Photometer with 20000 Lux Range, 2X Per Second Sampling and Digital Display Measurement range up to 20,000 LUX Reading hold function Adjustable range for quick easy readings Accuracy max 3% Repeatability: 2% Sampling rate: 2 times/sec 9V battery operated (not included) Sold as : Unit Measurement range up to 20,000 LUX - Sampling rate: 2 times/sec Reading hold function - 9V battery operated (not included) Adjustable range for quick easy readings Accuracy max 3% Repeatability: 2%