The Nady DSM-1 Digital SPL Meter boasts an omnidirectional 1/2" electret condenser mic for easy placement and super-accurate readings. The sound meter's 2 level ranges cover 30dB to 130dB at 32Hz to 8kHz. Features of the DSM-1 SPL meter include 4-digit LCD with selectable permanent backlight, selectable A or C weighting, and fast or slow response. A Hold button captures input at any time. An alarm sounds when input is above the specified range, and an internal battery tester keeps the Nady DSM-1 meter honest. Use the meter's threaded insert to attach it to an optional SMT-3 tripod or a standard camera tripod. You get up to 50 hours battery life from a single 9V battery. Nady includes a foam windscreen, sturdy vinyl carrying case, and battery with the DSM-1 Digital SPL Meter.