This kit pairs the REED R8050 dual-range Type 2 sound level meter with the REED R8090 acoustic calibrator, packaged together in a hard, laser-cut foam carrying case along with a windshield ball and batteries. It gives buyers an out-of-the-box way to both measure sound levels and verify meter accuracy in the field. This version ships with a NIST-traceable calibration certificate for the sound level meter.