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 inches tall and with a chamber that can hold a length of 20 cm 7.9 inches 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 inches so there always enough space to grow. The pump takes three AAA batteries and is NOT waterproof. HOW 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. WARNING Please read the product manual before using any type of vacuum pump or constriction ring. Stop using the devices immediately if you experience any pain or discomfort. The controller head and transparent suction tube could be dissembled for ease of cleaning. Clean the cylinder and the masturbation sleeve with warm water before and after each use, we recommend using a toy cleaner or anti-bacterial wipe. Always use a water-based lubricant with this product for maximum pleasure. DO NOT use silicone lubricants.