Extech Type 2 Sound Level Meter Kit comes complete with 407732 Sound Meter, microphone wind screen, calibration screw driver, 9V battery, plus 407744 Sound Calibrator with two 9V batteries and screwdriver. Supplied in an attractive hard carrying case that provides protection and organization for your meter and accessories. Certified Kit comes complete with 407732-NISTL sound level meter with single point calibration to 94dB, combined with a NIST-certified 407744 94dB, 1kHz professional calibrator.