This handheld digital sound meter has a built-in 1/2" condenser microphone with wind shielding cover. It has been designed for the measurement of sound and temperature. It provides rapid, accurate readings displayed on an easy-to-read backlit LCD dual display. The device features fast/slow response, data hold, min/max and auto power off. The ergonomic design is highly portable and pocket-sized. There is a low battery indicator. Requires 3x AAA batteries.Features & Benefits:• Backlit LCD dual display• Built-in 1/2" condenser microphone with wind shielding cover• Fast/slow response• Air temperature selector - ? or °F• Features data hold, min/max and auto power off• Low battery indicator• Requires 3x AAA batteriesSpecifications:Data update: 300msPower supply: 3 x 1.5V AAA (sold separately)Operating time: Up to 60 hrsWeight (with batteries): 123.5gContents:1 x Handheld Digital Sound Level Meter, 35-135dB