Bosch GBH 18V-24 C Professional, 102.5 dB, 91.5 dB, 9.45" (240 mm), 14.6" (370 mm), 3.94" (100 mm) Bosch GBH 18V-24 C Professional. Sound power level: 102.5 dB, Sound pressure level: 91.5 dB. Package width: 9.45" (240 mm), Package depth: 14.6" (370 mm), Package height: 3.94" (100 mm)