3M Littmann Master Cardiology Stethoscope, Black, 1 Each Procedure Drapes and Sheets *Dual Independent Channels *Adjustable timer Style:Pair (Left & Right) *Dual Independent Channels *Adjustable timer on standard and digital units *Adjustable Frequency and Pulse Duration parameters *Basic and Standard units feature three modes: Burst Normal and Modulation *Digital units feature 5 modes: Burst Normal Modulation Rate and Width Strength Duration and Bi Pulse * Digital unit has easy to read LCD Display and convenient digital controls * Reduces the amount of gripping ability needed for some daily activities * Clip fits snuggly and comfortably against hand * The perfect solution for people with arthritis or reduced hand strength * Spring action hand clip fits snug against the hand * Attaches to objects with strips of heavy duty hook and loop * Can be used on phones cups bottles hair brushes etc Attach the included special procedures adapter for neonatal or pediatric applications The 27 inch 3M™ Littmann® Master Cardiology™ stethoscope features next generation tubing that's oil and alcohol resistant as well as free of latex