Rechargeable automatic pump with incredible suction at the push of a button Ultra-flanged base for secure seal Easy-grip controller for single-handed use Removable, body safe Silicone donut for comfortable use Quick air release button Clear cylinder with incremental measurements Easy push-button control Disassembles for easy cleaning Ultra-Soft and cushy dual Silicone ring help maintain andstrengthen erection Instructions included USB rechargeable - charging cord included Complete charge in 2 hours Total run time: 3 hoursDimensions:Cylinder: 8 x 2.25 in.Donut: 2.75 x 1.25 in.Ring Diameter: 1 in.Overall Ring: 2.75 x 2 in.