The Smart Penis Pump - Smart, Comfortable, Effective Intermittent suction at your desired vacuum suction Incredible Stimulation LCD screen USB rechargeable Easy to use & Clean Includes: Silicone Ring & Silicone Cylinder Sleeve for a tight seal Details: Insertable length - approx 8.75" Cylinder Diameter - approx 2.5" Charging time - approx 130 minutes Run time on high - approx 150 minutes Run time on low - approx 12 hours Acrylic cylinder is removable for cleaning