The next generation in electronic stethoscopy combining impressive acoustic amplification, electronic noise filtering and comfortable ergonomic design

The 657 features:

• Amplifies up to 16x (24db) over traditional acoustic scopes
• Patented piezopolymer film contact microphone provides wider frequency response than acoustic mikes used in competing models
• Three frequency modes: Bell (15-200Hz) for cardiac sounds Diaphragm (100-500Hz) for lung sounds Extended Range (15-1000Hz) 8 level volume control
• Holds last mode and volume setting for convenience
• Auto-shut off after 3 minutes extends battery life
• Battery warning LED signals when replacement needed
• Binaurals fixed at 15º angle for snug aural fit
• Specially constructed ADSOFT PVC eartips for the ultimate in wearing comfort and acoustic seal
• Lightweight and compact - weighs under 6 oz., measures just 28"
• Uses "AAA" battery (included) 2 year warranty