SOUND LEVEL METER Four Functions: Sound Level Meter, Light Meter, Humidity Meter, and Temperature Meter - Included Accessories: 9V Battery, K-Type Temperature Probe Light: Max Range 20000 Lux, Resolution 0.1 Lux, Accuracy + / - 5.0-Percent - Dimensions: 9.89-Inch H x 2.51-Inch W x 1.57-Inch D Sound: Max Range 130 dB, Resolution 0.1 dB, Accuracy + / - 3.5 dB Humidity: Max Range 95-Percent RH, Resolution 0.1-Percent RH, Accuracy + / - 5-Percent RH Temperature: Max Range 760 -DegreeC / 1400 -DegreeF, Resolution 0.1 -DegreeC/ F, Accuracy + / - 3.0-Percent Product DescriptionFrom the Manufacturer The PSPL41 is a 4-in-1 multifunction environment meter capable of measuring sound levels, light, humidity, and temperature. It includes a K-type temperature probe to measure temperature, a detachable sensor to measure light, and a built in microphone to measure sound. Includes a 9 V battery required for operation.