Measure ranges between 40~130dB (decibels). Two equivalent weighted sound pressure levels, A and C. * Fast and Slow dynamic characteristics modes ; Tripod mount. Low battery indicator. * Max locked function has the maximum value, after the stent-in-one unique, easy to use. * Size: 10 x 2.75 x 1.25" ;Color: Yellow; Package Contents: 1 x USB Digital Sound Level Meter * HDE® is a registered trademark and is the only authorized seller of HDE branded products