This revolutionary patent 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 incredible 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.Features: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 experience. Surround your penis with 3 modes of stimulating vacuum suction that snugly tugs you to ecstasy!The Results are Clear : The clear durable suction tube allows you to view the action.Removable Soft Pleasure Topper : The stretchy pleasure topper features a supple vagina that forms an air-tight seal to create intermittent suction. The topper is removable for easy cleaning and the pump may be used with or without it.Erectile Dysfunction Aid : Regular masturbation strengthens pelvic floor muscles, helping to prevent erectile dysfunction (ED) in men. Edging, the practice of purposely delaying orgasms, can build a sexual stamina and can help with ED by encouraging healthy blood flow to the penis.