This kit comes equipped with a rugged carrying case and the tools you need to conveniently calibrate your sound level meter in the field. The R8050-KIT includes the R8050 Sound Level Meter, the R8090 Sound Level Calibrator (SC-05), the R8888 Hard Carrying Case with Laser Etched Custom Foam Interior (specifically designed for the included instruments), as well as a wind shield ball and batteries.