Bearing types: hydraulic pressure Voltage (VDC) : 7-13.8 The working life (hours) 20000 Noise value (db) : 25 Specification Bearing Type Hydraulic Voltage (VDC) 7-13 .8 Working life (hours) 20000 Noise (dB): 25 ± 10% Scope Support: Intel Socket 478 based processorsIntel Pentuim4 2.8GIntel Celeron D 2.93GIntel Celeron 4 2.8G