VERSATILE & LONG-LASTING: Our classroom noise meter can be used all over your space It ' s wall mountable with a 10ft power cord, flat-bottomed for placing on tables, and lasts for hours unpluggedwith a 2000MaH battery Also, it can be theater SPLmeter by the or in your garage workshop WIDE APPLICATIONS: This Large LED displayDecibel Meter can be mounted on the wall or placed on the desk, it is a great noise meter to the sound in Classroom, Studio room, routes, factories, construction site, home, offices 4 in 1 Design: We have includes HUMIDITY and TEMPERATURE readings in addition to bringing you the bestdecibel meter we could And the sound tester has 3 ADJUSTABLE SPEEDS ( 1 Fast 2 3 Slow) to make reading it easier, and with Clock function 4 in 1 design LARGE LCD DISPLAY & WALL MOUNT: Our digital sound meter is equipped with a highdefinition backlit LCD screen, so that you can read it throughout the day at your convenience Unlike handheld sound meters, our wall-mountable dBmeter is simple to set up and perfect for continuous