Bell DIAGNOSTIC AUDIOMETER has a bell is a screening/diagnostic audiometer, capable of performing fast and factual breath and bone threshold examinations. Simple operation, a user friendly interface and easy portability make Bell the optimal instrument for private clinics, multi specialist clinics and occupational medicine applications. Key Aspects Bell Configurations: Bell is available in two configurations to suit distinct user requisite has Basic and Plus. Basic Model: Basic model has the screener. Basic Model Features: The Basic model features manual and automatic breath conduction threshold examinations at frequencies from 125 Hz up to 12.5 kHz with masking. Plus Model: Plus model has the basic diagnostics. Plus Model Features:The Plus model can perform bone conduction audiometric examinations in addition to air conduction exams.