The Sound Level Meter is used to measure sound level in decibels (dB). Switches on the meter are used to select dBA or dBC weightings and fast or slow response times. The Sound Level Meter has an LCD panel to use it as a stand-alone device. A Maximum Level Hold switch provide flexibility in the standalone mode. Included are: Vernier Sound Level Meter Wind screen (black foam cover for the sensing element) Cable to connect the sensor to a data-collection interface Instruction Manual **This item requires the use of a LabQuest computer interface which is also available for checkout. Click the checkout tab to check this item out.