With a choice of 3 different sucking speeds, this pump has something for everyone. At the touch of a single button, the AUTOMATIC CYBER PUMP will create a super strong vacuum, giving a quick and powerful erection. The super-soft masturbation sleeve magnifies the view of your penis for unmatched visual stimulation. The pump always creates a tight seal for comfortable but very effective suction! This high-tech pump is really easy to disassemble and clean. Standing 29.5 cm (11.7) tall and with a chamber that can hold a length of 20 cm (7.9) it revs up to an incredible 4600 RPM at a very low noise level of less than 55 dB. The inner girth is 6.1 cm (2.4) so there always enough space to “grow. The pump takes three AAA batteries and is NOT waterproof.rrHOW TO USE Lubricate the sleeve of the cylinder and your penis with a water-based lubricant before use. DO NOT use silicone lubricants. If you feel uncomfortable with the vacuum at any time, release some of the vacuum through the vacuum release button. To achieve the best result, you can apply some efficient techniques: such as: alternating the vacuum from time to time or making stroking movements after erection.rWARNING:Please read product manual before using any type of vacuum pump orconstriction ring.Stop using the devices immediately if you experience any pain or discomfort.