The high-tech and self-contained Rechargeable Stamina Pump is the future of penis pumps. This fully automatic pump has easy to use one-handed pressure control with four levels of suction. Disassembles for easy cleaning and the flanged base keeps you sealed and secure. Track your progress using the universal measurements on the cylinder. When you're ready to go use the quick air release valve which relieves pressure while maintaining suction. PS plastic cylinder with silicone sleeve. Comes with USB charger. 8.25” x 2.5”/21 cm x 6.25 cm.