Measuring just 75.5mm x 54.0mm x 37.0mm, the new CEL-120 acoustic calibrator helps users achieve highly accurate calibration of sound level meters in the field. Fully compliant with IEC 60942:2003 and ANSI S1.40:2006 standards, the new CEL-120 incorporates the latest digital technology for exceptionally stable acoustic performance, as well as dual calibration level (Class 1 version) of 94dB and 114dB at 1kHz. Casella CEL Inc.,,(800) 366-2966. products