This revolutionary patented design allows you to customize your pleasure with an extendable tube that locks in place at the exact length you desire. The Extender Pro Vibrating Pump has progressive IST technology with incredibly realistic intermittent suction to provide lifelike "milking" sensations for the best blow job of your life! For an even more mind-blowing masturbation experience, enjoy fully automated vibration along with the powerful suction. Simply press the buttons on the rechargeable motor for 3 suction modes and 5 patterns of teasing vibrations that travel all the way up your penis. The crystal-clear tube is designed for a firm grip and allows you to view the action. The stretchy TPR pleasure donut helps create a tight seal, while the supple internal pleasure nubs gently stroke your shaft. Progressive IST Technology = Lifelike Intermittent Suction - Enjoy maximum pleasure with realistic intermittent suction that automatically milks your shaft and feels just like a real oral sex experience. Surround your penis with 3 modes of stimulating vacuum suction that snugly tugs you to ecstasy! Resting Tube Length - 8" (20.5cm) Extended Tube Length - 10.25" (26cm) USB Rechargeable - Ready when you are! Easily and conveniently rechargeable with included charging cord, offering hours of enjoyment.