Penis Pump Extender Enlargement Vacuum Cup Hanger Trainer Penile Enlarger Edge Stretcher Strap Exerciser Dick Enhancement Tension Kit Male Masturbators Sex Toys for Men Delay Lasting SetTips: Adapt to 15 minutes for the first use How Long Time to use: It is recommended to use 2-3 times a week , 15-30 minutes each time , and the effect of continuous use for 2-3 weeks is significant . How to use: (Adapt to 15 minutes for the first use) 1. Put the sleeve all over to the middle of the cup. 2.The penis needs partial (slightly) erection and hyperemia , then put the penis into the cup. 3.Flip the sleeve to the cylinder, then pull down sleeve and cover the penis. 4.You can use it in your regular activities at any time. and you can also hang the trainer on the waist belt, leg belt. Size: Size of the Bracket :Fit Any Size. If you want the longer length, you can buy some more screws . How to choose the cup:When the penis is erect, wrap a string around the thickest part of the glans and measure the length of the string. The circumference of the thickest part of the glans is more than 13cm, use a Large Cup (inner diameter 42mm), The circumference of the thickest part of the glans is 11.5-13cm, using a Medium Cup (inner diameter 38mm), If the circumference of the thickest part of the glans is less than 11.5cm, use a Small Cup (inner diameter 33mm);