Unlike conventional hand pumps, the Dr. Joel Kaplan Electric Male Enlargement Pump system is more efficient because it creates a continuous and even flow of vacuum pressure. In addition, Dr. Kaplan's system is personally gratifying, "feels great" and is ideal for self-stimulation due to the variable pulsation feature only available with the electric pump. Includes a large nylon storage bag, instruction booklet, constriction rings for penis and testicles, transparent, Large 2.25 inch leak-free cylinder, over ten feet of tubular extension for ease of usage, and an electric pump. Safety Features include: convenient On/Off Switch with safety release valve.