Penis pumps, also known as vacuum erection devices (VED) or erection pumps, vacuum constriction devices (VCD) or male masturbators are devices used for addressing erectile dysfunction (ED), increasing penis size or enhancing sensation during solo or couples play including via remote control. 

They consist of a cylindrical chamber that is placed over the penis and can be open on the end or can be a closed chamber to create a secure, airtight seal around the penis. A pump extracts air from the chamber, generating a vacuum while the suction effect accelerates blood flow to the penis to facilitate an erection.

Pumps usually feature a vent to adjust pressure, may be automated for hands-free use or operated manually and some can be controlled remotely via a connected device or synchronised with videos and livesteams for augmented reality (AR). They may also include other different design features such as interchangeable sleeves, heating functions, use of water or sonic waves and LED light to stimulate cellular function and blood flow.