The Bio-Pulse 9001 jacket - convenient for travel and shows; has 2 magnetic coils on the hip/haunches, provides therapy for the hip, pelvis and spine. A rechargeable, computer controlled unit delivers 30 minutes of therapy, and shuts off automatically, pulsing at three different rates. Your dog can sit down, walk, or lie down while the system is on. System weighs only 4 pounds. Jacket measured from base of neck to base of tail and is 23" for the small and 30" for large. Ask us about rental options.