This small but powerful manual pump is ideal as a discreet and powerful masturbation toy! Use water-based lubricant and place the transparent, flexible TPE sleeve. Tighten the strap around the testicles to keep it in place. Connect the tube to the end of the sleeve and place the powerful vibrator in the sleeve's holder. Enjoy intense emptying with suction and vibration features! Use the small manual remote control to select the desired intensity. Enjoy 3 speeds and 7 vibration patterns on the shaft! Experience all three levels of powerful suction and reach up to 3000 RPM at the highest setting! With the liquid chamber inside the suction tube, you can be sure that cleaning will be easy. This liquid chamber will prevent any additional fluids from traveling too far into the tube.