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.