In the penis wear "Wholesale vibrator cock ring" (tightening ring) can slow blood flow penis retreat, tighten the ring does not increase blood flow penis, but once they reach an erection (for example, by vacuum suction device), "Wholesale vibrator cock ring "can prolong erection time. Tightening ring can not be used more than thirty minutes, if you feel cold penis / numbness or pain in the genital area, you should immediately remove the tightening ring. Can be hung from belt to ride freely adjust the tightness, "Wholesale vibrator cock ring" in direct contact with the skin material is very soft, comfortable, easy-to-tight and tied off. Each product is firmly attached to D deduction, you can use the padlock, ropes, hooks, etc. with the use of nickel. (Padlock, ropes, hooks and other nickel is sold separately).