Stethoset Attachment B Ultrasonic "name":"What is the difference between

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Comfortable and slim

deep in-ear fit for maximum noise isolation

flasher and flashing icons for alerting deaf/blind and hard of hearing users when a Serene Innovations Innovations CentralAlert transmitter has been activated

Direct connection to assistive listening devices or headset (2

Stethoset Attachment B Ultrasonic "name":"What is the difference betweenFor use with the Lightweight Plastic Testing Stethoscope (SKU 3412) or the Durable Steel Stethoscope (SKU 3413) when Custom or Canal Aids have an average size canal. Part B consists of tubing, male snap in attachment, and female canal tip earmold receptacle. Overall length is 12 inches. Stethoscope attachment 787B Part B attachment with standard sized bell tip. Sold individually.