Winco Locking Caster Special Oxygen Masks Pulse:40~180times minutes Endoscopy Pulse:40~180times minutes Professional Grade product designed for durability and effectiveness * It is used around the world in both clinical and home environments * A strong massage with no work: Thumper Mini Pro does the work not the user * Its long handle design is perfect for treating others and for self use at home * You can reach areas like the shoulders hamstrings and midback * This product is excellent for self care * With three electronically controlled speed settings at 20 30 and 40 pulses per second the Mini Pro can be adjusted to accommodate personal preference * Easy to hold and maneuver and over 95% of the units output is directed through the massage spheres eliminating feedback through the handle * 12 ft Heavy duty 5'' (13 cm casters) with positive locking swivel and wheel brake * Brake easily set & released by foot * Smooth rolling action regardless of weight in chair *